Alex Trebek returns to 'Jeopardy' after completing chemo for stage 4 pancreatic cancer

We'll take "Resilient Canadians" for $800, Alex.

79-year-old Alex Trebek is back in action on set of "Jeopardy" six months after learning he has stage 4 pancreatic cancer. Trebek's return to work comes on the heels of completing several rounds of chemotherapy.

"I've gone through a lot of chemotherapy, and thankfully that is now over," he says in a behind-the-scenes video posted Thursday afternoon. "I'm on the mend, and that's all I can hope for right now."

"Let me tell you, it's going to be a good year," Trebek adds in the video clip.

Chemo has been physically and emotionally painful, he admitted earlier this year, acknowledging on "Good Morning America" that he's struggled to push through bouts of depression.

"I’ve had kidney stones, I’ve had ruptured discs, so I’m used to dealing with pain, but what I’m not used to dealing with is the surges that come on suddenly of deep, deep sadness," he told Robin Roberts. "And it brings tears to my eyes."

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Alex Trebek and wife Jean Currivan
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Alex Trebek and wife Jean Currivan
HOLLYWOOD, CA - JUNE 04: TV personality Alex Trebek (L) and Jean Currivan Trebek attend the 43rd AFI Life Achievement Award Gala honoring Steve Martin at Dolby Theatre on June 4, 2015 in Hollywood, California. (Photo by Michael Kovac/Getty Images for AFI)
BURBANK, CA - APRIL 26: TV personality Alex Trebek (L) and Jean Currivan Trebek attend The 42nd Annual Daytime Emmy Awards at Warner Bros. Studios on April 26, 2015 in Burbank, California. (Photo by Michael Buckner/Getty Images for NATAS)
LOS ANGELES, CA - NOVEMBER 12: TV host Alex Trebek (L) and Jean Currivan Trebek attend the celebratory dinner after the special tribute to Sophia Loren during the AFI FEST 2014 presented by Audi at Dolby Theatre on November 12, 2014 in Hollywood, California. on November 12, 2014 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for AFI)
HOLLYWOOD, CA - JUNE 05: Jean Trebek (L) and TV personality Alex Trebek attend the 2014 AFI Life Achievement Award: A Tribute to Jane Fonda at the Dolby Theatre on June 5, 2014 in Hollywood, California. Tribute show airing Saturday, June 14, 2014 at 9pm ET/PT on TNT. (Photo by Michael Buckner/WireImage)
HOLLYWOOD, CA - JUNE 04: TV personality Alex Trebek (L) and Jean Trebek attend the 2014 AFI Life Achievement Award: A Tribute to Jane Fonda at the Dolby Theatre on June 5, 2014 in Hollywood, California. Tribute show airing Saturday, June 14, 2014 at 9pm ET/PT on TNT. (Photo by Kevin Winter/WireImage)
BEVERLY HILLS, CA - APRIL 25: TV personality Alex Trebek (R) and Jean Trebek arrive at the Jonsson Cancer Center Foundation's 19th Annual 'Taste For A Cure' at Regent Beverly Wilshire Hotel on April 25, 2014 in Beverly Hills, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LAS VEGAS, NV - JUNE 19: Alex Trebek (R) and Jean Currivan Trebek arrive at the 38th Annual Daytime Entertainment Emmy Awards held at the Las Vegas Hilton on June 19, 2011 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
Alex Trebek and wife Jean Currivan attend Hollywood Stars Night Thoroughbred Horse Race on June 22, 1990 at Hollywood Park in Hollywood, California. (Photo by Ron Galella, Ltd./WireImage)
Alex Trebek and wife Jean Currivan attend the opening of 'Jackie Mason - Brand New' on May 30, 1990 at the Henry Fonda Theater in Hollywood, California. (Photo by Ron Galella, Ltd./WireImage)
Alex Trebek and Jean Currivan during The 49th Annual Thalians Ball at Century Plaza Hotel in Los Angeles, California, United States. (Photo by John Heller/WireImage)
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In late May, nearly three months after sharing news of his diagnosis, fans were overjoyed to learn that Trebek was already "near remission": "Some of the tumors have already shrunk by more than fifty percent," he told People.

A month later, in June, Trebek received a standing ovation when he walked onstage to present at the NHL Awards.

The longtime TV personality has proven inspirational for other cancer patients across the globe who are battling diseases with low survival rates. After hearing from a fan whose mother is also battling pancreatic cancer, he sent a handwritten message in the mail: "Karen, Let’s you and I decide that we both are going to be cancer survivors. Stay positive! All the best.”

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