Sophia Bush leaving 'Chicago P.D.' after four seasons


Chicago P.D. is saying goodbye to one of its stars.

Sophia Bush is departing the NBC cop drama after four seasons.

The departure comes after a surprising seasonfinale in which Bush's character, Det. Erin Lindsay, was faced with moving to New York for an undercover assignment with the FBI's counter-terrorism unit in order to protect her troubled mother Bunny (Markie Post) who had become embroiled in a murder investigation.

The potential job change also came just as Lindsay's on-and-off boyfriend, Det. Jay Halstead (Jesse Lee Soffer), was thinking about proposing.

Offscreen, this is the latest change for Chicago P.D., which also recently saw the departure of series regular Jon Seda, who moved to Chicago Justice, as well as the exit for co-creator and showrunner Matt Olmstead, who left for a lucrative overall deal with ABC Studios.

See photos of Sophia Bush on the show:

31 PHOTOS
Sophia Bush stars in Chicago P.D.
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Sophia Bush stars in Chicago P.D.
CHICAGO P.D. -- '300,000 Likes' Episode 407 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC)
CHICAGO P.D. -- 'A Shot Heard Around The World' Episode 408 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- '300,000 Likes' Episode 407 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Jason Beghe as Hank Voight, Chelsea Morgan as Sloane Tuxhorn -- (Photo by: Matt Dinerstein/NBC)
CHICAGO MED -- 'Inherent Bias' Episode 207 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Elizabeth Sisson/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Skin in the Game' Episode 406 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'All Cylinders Firing' Episode 405 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'All Cylinders Firing' Episode 405 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Jesse Lee Soffer as Jay Halstead -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Skin in the Game' Episode 406 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'All Cylinders Firing' Episode 405 -- Pictured: (l-r) Sophia Bush as Erin Linday, Jesse Lee Soffer as Jay Halstead -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'All Cylinders Firing' Episode 405 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Marina Squerciati as Kim Burgess -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'A War Zone' Episode 404 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Parrish Lewis/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'All Cylinders Firing' Episode 405 -- Pictured: (l-r) Jesse Lee Soffer as Jay Halstead, Sophia Bush as Erin Lindsay -- (Photo by: Jean Whiteside/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Big Friends Big Enemies' Episode 403 -- Pictured: (l-r) Jon Seda as Antonio Dawson, Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Silos' Episode 401 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Jesse Lee Soffer as Jay Halstead -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Silos' Episode 401 -- Pictured: (l-r) LaRoyce Hawkins as Kevin Atwater, Patrick John Flueger as Adam Ruzek, Sophia Bush as Erin Lindsay, Jesse Lee Soffer as Jay Halstead -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Silos' Episode 401 -- Pictured: (l-r) Patrick John Flueger as Adam Ruzek, Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Start Digging' Episode 323 -- Pictured: (l-r) Sophia Bush as Detective Erin Lindsay, Jason Beghe as Sgt. Hank Voight -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Start Digging' Episode 323 -- Pictured: Sophia Bush as Detective Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'She's Got Us' Episode 322 -- Pictured: (l-r) Jesse Lee Soffer as Detective Jay Halstead, Sophia Bush as Detective Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'In a Duffel Bag' Episode 320 -- Pictured: (l-r) Sophia Bush as Detective Erin Lindsay, Lissette Espaillat as Nariela Hernandez, Jesse Lee Soffer as Detective Jay Halstead -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'In a Duffel Bag' Episode 320 -- Pictured: (l-r) Jason Beghe as Sergeant Hank Voight, Sophia Bush as Detective Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'If We Were Normal' Episode 319 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Oliver Platt as Daniel Charles, Jason Beghe as Hank Voight -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'If We Were Normal' Episode 319 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Cases That Need To Be Solved' Episode 316 -- Pictured: (l-r) Elias Koteas as Alvin Olinsky, Sophia Bush as Erin Lindsay, Jesse Lee Soffer as Jay Halstead, Patrick John Flueger as Adam Ruzek -- (Photo by: Elizabeth Sisson/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Cases That Need to Be Solved' Episode 316 -- Pictured: (l-r) Jon Seda as Antonio Dawson, Eamonn Walker as Chief Wallace Boden, Ser'Darius Blain as Brian Johnson, Tiffany Renee Johnson as Lauren Brooks, Jesse Lee Soffer as Jay Halstead, Sophia Bush as Erin Lindsay, S. Epatha Merkerson as Sharon Goodwin, Samuel Hunt as Craig Gurwitch -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Kasual with A K' Episode 318 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'The Cases That Need to Be Solved' Episode 316 -- Pictured: (l-r) Sophia Bush as Erin Lindsay, Tiffany Renee Johnson as Lauren Brooks, Jon Seda as Antonio Dawson -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'A Night Owl' Episode 315 -- Pictured: (l-r) Kara Killmer as Sylvie Brett, Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Kasual with A K' Episode 318 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
CHICAGO P.D. -- 'Hit Me' Episode 313 -- Pictured: Sophia Bush as Erin Lindsay -- (Photo by: Matt Dinerstein/NBC/NBCU Photo Bank via Getty Images)
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In addition to Olmstead, exec producers Michael Brandt and Mark Tinker also left at the end of season four. Rick Eid, who most recently served as showrunner of Law and Order: SVU, will take over as showrunner for Chicago P.D's upcoming fifth season, where it will hit its 100th episode.

(It also remains to be seen if Seda will return to Chicago P.D. following Chicago Justice's cancellation earlier this week.)

Bush was one of several actors brought onto Chicago P.D. after the backdoor pilot was shown as a season one episode of Chicago Fire. Bush, as well as Soffer and Patrick John Flueger, were brought onto the Dick Wolf procedural after starring together in NBC's Hatfields & McCoys pilot, which was not picked up to series.

Like Fire, which has written out at least five series regulars in as many seasons, P.D. has also not shied away from mixing up the core ensemble. Archie Kao was killed off the show at the end of season one and Brian Geraghty departed at the end of season three.

This past season saw Chicago P.D. welcome several new recurring faces for multi-episode arcs, including Quantico grad Li Jun Li, Revenge alum Nick Wechsler, NYPD Blue alum Esai Morales, and most recently, former Revolution star Tracy Spiridakos, who was introduced in the final episodes of the season as a new member of the Intelligence Unit, temporarily taking over for Marina Squerciati's Burgess. (In real life, Squerciati was on maternity leave and is expected to return for season five.)

"We didn't start off at the beginning of this season with a big whiteboard like, who can we move out? Who can we move in? But we certainly wanted to be this season, as you do every season, ready for anything," Olmstead told THR in January. "[We thought], 'Let's be light on our feet. If there is any change, whether long-term or short-term, let's embrace it and use it as an opportunity for storytelling and conflict.'"

In addition to Chicago P.D., Bush appeared multiple times on the other Chicago shows as well as Law and Order: SVU. Her starring role on P.D. followed a nine-season run on One Tree Hill. Her other credits include Nip/Tuckand John Tucker Must Die. She next appears in the Bruce Willis film Acts of Violence.

See more photos of Sophia Bush:
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Sophia Bush Style
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Sophia Bush Style
Sophia was radiant in this light pink ERIN Tuxedo Dress, attending an ELLE party.  She paired the look with Christain Louboutin heels.
You can never go wrong with lovely lace, and Sophia paired this Katharine Kidd dress with Valentino heels.
Bush was picture-perfect for fall at the 3rd Annual Autumn Party, wearing a paneled J.Mendel dress with pops of red on her nails, lips, and "Bow Bow" Christian Louboutin heels.
Sophia paired a patterned silk top with this skirt by Karolyn Pho for a celebration hosted by Google and ELLE for leading women in Washington.
Sophia attended Global Green USA's 10th annual pre-Oscar party in February, wearing an environmentally-conscious suit by H&M.
Sophia attended Coachella festivities, visiting a kick-off event with H&M in a midriff-baring top and patterned high-waisted pants.
She wore this Lela Rose gown to the White House Correspondents' Dinner, and Sophia's high bun and drop earrings were the perfect accent. 
Sophia made our best-dressed list (aka Look of the Week!) in this outfit, stunning at an event at the Beverly Hilton Hotel.
Sophia looked comfortable and chic in this Smythe suit, attending the launch of Target's FEED Collaboration this June.
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