'Big Bang Theory' premiere: Everything you need to know about Sheldon and Amy's future

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EXCLUSIVE: 'Big Bang Theory' Star Jim Parsons Also Hates the Shamy Break Up: 'I Wish We Were Married!'

Our whole universe was in a hot dense state, then nearly 14 billion years ago expansion started. Wait...

After nearly a decade on the air, true "Big Bang Theory"fans know all the lyrics to that beyond-catchy theme song -- and they also should know that season nine of the hit CBS comedy premieres tonight!

To get you prepared for what's next after those relationship bombshells in the season eight finale, ET hit the "Big Bang" set to catch up with stars Jim Parsons and Mayim Bialik.

Plus, we called up executive producer -- and keeper of all the secrets -- Steve Molaro to get your exclusive scoop on what's coming up next for our beauty and geek in season nine.

WATCH: Sheldon & Amy's 'Rough' Break Up and If They'll Make Up!

Molaro confessed to ET that their goal for season nine is to keep the show "fresh, fun and funny" and one of the ways to do that was to throw an understandable wrench into Sheldon and Amy's relationship.

"I understand where Amy was at," the show runner explained. "I think she loves him and she knows that he loves her in whatever way he's capable of, but they've been together for over five years. And if it's your fifth anniversary night, and you're making out -- because that's all you do -- and the person you're making out with is really only thinking about The Flash TV show, that's the thousandth straw on that camel's back.

See photos of the "Big Bang Theory" cast in the gallery below:

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'Big Bang Theory' premiere: Everything you need to know about Sheldon and Amy's future
LOS ANGELES - APRIL 19: 'The Line Substitution Solution' -- Pictured: Trevor (Blake Anderson), Sheldon Cooper (Jim Parsons), Leonard Hofstadter (Johnny Galecki), Howard Wolowitz (Simon Helberg) and Rajesh Koothrappali (Kunal Nayyar). Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly (Christine Baranski), comes to town and Penny struggles to make a connection with her, on THE BIG BANG THEORY, Thursday, May 5 (8:00-8:31, ET/PT) on the CBS Television Network. (Photo by Michael Yarish/CBS via Getty Images)
LOS ANGELES - APRIL 19: 'The Line Substitution Solution' -- Pictured: Sheldon Cooper (Jim Parsons), Leonard Hofstadter (Johnny Galecki), Stuart (Kevin Sussman) and Howard Wolowitz (Simon Helberg). Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly (Christine Baranski), comes to town and Penny struggles to make a connection with her, on THE BIG BANG THEORY, Thursday, May 5 (8:00-8:31, ET/PT) on the CBS Television Network. (Photo by Michael Yarish/CBS via Getty Images)
LOS ANGELES - APRIL 19: 'The Line Substitution Solution' -- Pictured: Sheldon Cooper (Jim Parsons), Howard Wolowitz (Simon Helberg), Rajesh Koothrappali (Kunal Nayyar) and Leonard Hofstadter (Johnny Galecki). Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly (Christine Baranski), comes to town and Penny struggles to make a connection with her, on THE BIG BANG THEORY, Thursday, May 5 (8:00-8:31, ET/PT) on the CBS Television Network. (Photo by Michael Yarish/CBS via Getty Images)
HOLLYWOOD, CALIFORNIA - MARCH 16: (L-R) Moderator Alie Ward, executive producers Chuck Lorre, Steven Molaro, Bill Prady, actors Mayim Bialik, Jim Parsons, Kaley Cuoco, Johnny Galecki, Simon Helberg, and Kunal Nayyar attend The Paley Center For Media's 33rd Annual PALEYFEST Los Angeles ÃThe Big Bang Theory' at Dolby Theatre on March 16, 2016 in Hollywood, California. (Photo by Matt Winkelmeyer/Getty Images)
BEVERLY HILLS, CA - MARCH 09: (L-R) Actors Jim Parsons, Melissa Rauch, Kunal Nayyar, Kaley Cuoco, Simon Helberg, Mayim Bialik and Johnny Galecki perform onstage during the 24th and final 'A Night at Sardi's' to benefit the Alzheimer's Association at The Beverly Hilton Hotel on March 9, 2016 in Beverly Hills, California. (Photo by Jesse Grant/Getty Images)
MUST SEE TV: AN ALL-STAR TRIBUTE TO JAMES BURROWS -- Pictured: (l-r) Kaley Cuoco, Simon Helberg, Johnny Galecki, Jim Parsons -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES - FEBRUARY 2: 'The Positive Negative Reaction' -- Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for the baby, on THE BIG BANG THEORY, Thursday, Feb. 18 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Pictured left to right: Kunal Nayyar, Simon Helberg, Johnny Galecki and Jim Parsons (Photo by Sonja Flemming/CBS via Getty Images)
LOS ANGELES - JANUARY 19: 'The Valentino Submergence' -- Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore, on THE BIG BANG THEORY, Thursday, Feb. 11 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Johnny Galecki, Simon Helberg, Jim Parsons and Kunal Nayyar (Photo by Monty Brinton/CBS via Getty Images)
LOS ANGELES - FEBRUARY 8: 'The Celebration Experimentation' -- After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest, on the 200th episode of THE BIG BANG THEORY, Thursday, Feb. 25 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Pictured left to right: Jim Parsons, Kunal Nayyar, Sara Gilbert, Kevin Sussman, Adam West, Simon Helberg, Melissa Rauch, John Ross Bowie, Wil Wheaton, Johnny Galecki and Kaley Cuoco (Photo by Monty Brinton/CBS via Getty Images)
LOS ANGELES - FEBRUARY 2: 'The Positive Negative Reaction' -- Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for the baby, on THE BIG BANG THEORY, Thursday, Feb. 18 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Pictured left to right: Simon Helberg, Kunal Nayyar, Jim Parsons and Johnny Galecki (Photo by Sonja Flemming/CBS via Getty Images)
LOS ANGELES - AUGUST 30: 'The Pulled Groin Extrapolation' -- Sheldon and Penny wonder how they'll get along when Leonard goes to a wedding as Amy's date. Meanwhile, Howard (Simon Helberg, left) and Bernadette (Melissa Rauch, right) spend the weekend with Mrs. Wolowitz, on THE BIG BANG THEORY, Thursday, Sept. 29 (8:00-8:31 PM, ET/PT) on the CBS Television Network. (Photo by Richard Cartwright/CBS via Getty Images)
LOS ANGELES - SEPTEMBER 23: 'The Workplace Proximity' -- Howard (Simon Helberg, left) finds himself sleeping on Raj'™s couch after a fight with Bernadette, on THE BIG BANG THEORY, Thursday, Oct. 17 (8:00 -“ 8:31 PM, ET/PT) on the CBS Television Network. Also pictured: Johnny Galecki (right) (Photo by Monty Brinton/CBS via Getty Images)
LOS ANGELES - APRIL 15: 'The Gorilla Dissolution' -- Howard (Simon Helberg, left) and Bernadette (Melissa Rauch, right) struggle to care for Mrs. Wolowitz, on THE BIG BANG THEORY, Thursday, May 8 (8:00-8:31 PM, ET/PT) on the CBS Television Network. (Photo by Sonja Flemming/CBS via Getty Images)
The cast and crew of €œ'The Big Bang Theory' accepts the award for favorite network TV comedy at the 40th annual People's Choice Awards at the Nokia Theatre L.A. Live on Wednesday, Jan. 8, 2014, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
LOS ANGELES, CA - SEPTEMBER 18: Kaley Cuoco is seen at 'Jimmy Kimmel Live' on September 18, 2014 in Los Angeles, California. (Photo by RB/Bauer-Griffin/GC Images)
LOS ANGELES, CA - SEPTEMBER 20: Kaley Cuoco is seen in Los Angeles on September 20, 2014 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
LOS ANGELES, CA - SEPTEMBER 20: Kaley Cuoco is seen in Los Angeles on September 20, 2014 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
LOS ANGELES, CA - AUGUST 25: Actress Kaley Cuoco (R) and husband Ryan Sweeting (L) attend HBO's 2014 Emmy after party at The Plaza at the Pacific Design Center on August 25, 2014 in Los Angeles, California. (Photo by Barry King/FilmMagic)
GOOD MORNING AMERICA - Rihanna, Steve Martin and Jim Parsons are all guests on 'Good Morning America,' 3/13/15, airing on the ABC Television Network. (Photo by Lou Rocco/ABC via Getty Images)
LOS ANGELES, CA - AUGUST 25: Actress Kaley Cuoco arrives to the 66th Annual Primetime Emmy Awards at Nokia Theatre L.A. Live on August 25, 2014 in Los Angeles, California. (Photo by C Flanigan/Getty Images)
BURBANK - JULY 23: Gallery Promo Coverage of CBS' THE BIG BANG THEORY, scheduled to air on the CBS Television Network. Pictured: Simon Helberg as Howard Wolowitz. (Photo by Monty Brinton/CBS via Getty Images)
Kaley Cuoco accepts the Favorite Comedic TV Actress award for The Big Bang Theory at the 40th annual People's Choice Awards at Nokia Theatre L.A. Live on Wednesday, Jan. 8, 2014, in Los Angeles. (Photo by Frank Micelotta/Invision/AP)
Mayim Bialik, winner of the award for favorite network TV comedy for "The Big Bang Theory," poses backstage at the People's Choice Awards at the Nokia Theatre on Wednesday Jan. 9, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Craig Ferguson, right, and "The Big Bang Theory" panel on Day 2 of Comic-Con on Friday, July 25, 2014, in San Diego. (Photo by Richard Shotwell/Invision/AP)
Jim Parsons poses with the award for best actor in a comedy series for “The Big Bang Theory” in the press room at the Critics' Choice Television Awards at the Beverly Hilton Hotel on Thursday, June 19, 2014, in Beverly Hills, Calif. (Photo by Richard Shotwell/Invision/AP)
Jim Parsons poses backstage with the award for outstanding lead actor in a comedy series for his role on “The Big Bang Theory” at the 65th Primetime Emmy Awards at Nokia Theatre on Sunday Sept. 22, 2013, in Los Angeles. (Photo by Dan Steinberg/Invision/AP)
Kunal Nayyar and Johnny Galecki accept the award for best supporting actor in a comedy series on behalf of winner Simon Helberg for "The Big Bang Theory" at the Critics' Choice Television Awards in the Beverly Hilton Hotel on Monday, June 10, 2013, in Beverly Hills, Calif. (Photo by Frank Micelotta/Invision/AP)
CORRECTS BYLINE TO CHRIS PIZZELLO - Kaley Cuoco poses backstage with her award for best supporting actress in a comedy series for "The Big Bang Theory" at the Critics' Choice Television Awards in the Beverly Hilton Hotel on Monday, June 10, 2013, in Beverly Hills, Calif. (Photo by Chris Pizzello/Invision/AP)
In this Tuesday, May 7, 2013 photo, actor Simon Helberg poses for a portrait in Los Angeles. Helberg is a co-star of the CBS television show, "The Big Bang Theory." (Photo by Matt Sayles/Invision/AP)
From left, actors Johnny Galecki, Kunal Nayyar, Mayim Bialik, Jim Parsons, Melissa Rauch, Simon Helberg and Kaley Cuoco, from the cast of "The Big Bang Theory," pose backstage at the 21st Annual 'A Night at Sardi's' to benefit the Alzheimer's Association at the Beverly Hilton Hotel on Wednesday, March 20, 2013 in Beverly Hills, Calif. (Photo by John Shearer/Invision for Alzheimer's Association/AP Images)
IMAGE DISTRIBUTED FOR ALZHEIMER'S ASSOCIATION - From left, actors Kunal Nayyar, Melissa Rauch, Jim Parsons, Mayim Bialik and Simon Helberg, from the cast of "The Big Bang Theory," arrive at the 21st Annual 'A Night at Sardi's' to benefit the Alzheimer's Association at the Beverly Hilton Hotel on Wednesday, March 20, 2013 in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision for Alzheimer's Association/AP Images)
Photo of Kunal Nayyar, left, and Simon Helberg courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Photo of Jim Parsons courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Photo of Johnny Galecki, left, and Kunal Nayyar courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Photo of Mayim Bialik, left, and Jim Parsons courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Photo of Kunal Nayyar courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Photo of Simon Helberg courtesy of Samsung Galaxy, taken during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Kaley Cuoco poses on arrival at the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Johnny Galecki arrives during the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Mayim Bialik poses on arrival at the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
Melissa Rauch poses on arrival at the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
CORRECTS IDENTITY - Jim Parsons poses on arrival at the Paley Center for Media's PaleyFest, honoring The Big Bang Theory at the Saban Theatre, Wednesday March 13, 2013 in Los Angeles, California. (Photo by Kevin Parry/Invision/AP)
The cast of "The Big Bang Theory" pose backstage with the award for favorite network TV comedy at the People's Choice Awards at the Nokia Theatre on Wednesday Jan. 9, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Kaley Cuoco, winner of the award for favorite network TV comedy for "The Big Bang Theory," poses backstage at the People's Choice Awards at the Nokia Theatre on Wednesday Jan. 9, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
BEVERLY HILLS, CA - DECEMBER 18: Actress Kaley Cuoco-Sweeting arrives at The PEOPLE Magazine Awards at The Beverly Hilton Hotel on December 18, 2014 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic)
NEW YORK - MAY 18: CBS announces their new fall schedule. (Jeffrey R. Staab/CBS via Getty Images) *** CBS presented its 2016-17 prime time schedule today (May 18) at Carnegie Hall, where many of the Networks new and returning series stars were in attendance. Pictured L-R: Melissa Rauch, Mayim Bialik, Simon Helberg, Kaley Cuoco, Jim Parsons, and Johnny Galecki from THE BIG BANG THEORY *** Melissa Rauch;Mayim Bialik;Simon Helberg;Kaley Cuoco;Jim Parsons;Johnny Galecki
LOS ANGELES - SEPTEMBER 9: 'The Hook-Up Reverberation' -- Raj's honesty about his past comes back to haunt him after his girlfriend, Emily, is cold to Penny. Also, the guys consider becoming part-owners in Stuart's comic book store, on THE BIG BANG THEORY, Monday, Oct. 6 (8:00-8:31, ET/PT), on the CBS Television Network. Pictured left to right: Laura Spencer, Simon Helberg, Melissa Rauch, Mayim Bialik, Jim Parsons, Johnny Galecki and Kaley Cuoco-Sweeting (Photo by Sonja Flemming/CBS via Getty Images)
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Molaro continued, "It may make you want to take a step back and be like, 'I care about this guy lot but am I doing the right thing long term for myself?'"

And while Amy is struggling to figure out if she wants to continue with relationship agreement, this shakeup will be especially frustrating for Sheldon because "he cannot apply science and logic to get an answer" in order to fix things.

"It has really opened up some really interesting colors for Jim to play that we've just never seen before and I think that we've been having a lot of fun with that," Molaro teased.

READ MORE: Kaley Cuoco-Sweeting Says Husband 'Loves' Her Ex Johnny Galecki

But we can always count on our little Shelly to reach out to his Mom -- played by fan favorite Laurie Metcalf -- at the most difficult times of his life. "I think she loves her Shelly very much and she just wants him to be happy and she's there for him," the EP explained.

As for the actors in real life? When we asked how the "Big Bang" stars would have changed the season eight finale, Parsons' answer was both sweet and unexpected: "Well, I mean, looking at it from today's lens, I wish we were married," the actor spilled with a smile. "I mean, I don't know if that would've been a very good place for the show to go though."

Parsons continued, "I do think we must be waiting on Sheldon to come to a better realization of not only that Amy is important to him, but specifically why. He will maybe be able to express that to her and maybe alter his behavior a little bit more to make her more inclined to want to continue."

And, of course, we had to ask about the sexy elephant in the room! After five years of dating (and breaking up) is our chance for some Sheldon and Amy coitus completely out of the question? "I think if the rift was about that specifically, I think we could work with coitus as a potential," Bialik spilled. "It may be part of the rift. But it's not the rift... I don't think we're going to have like what most other TV shows do when couples get back together."

Season nine of "The Big Bang Theory" premieres tonight at 8 p.m. on CBS.

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