Elias Koteas

CHICAGO P.D. -- "Allegiance" Episode 521 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: Parrish Lewis/NBC)

Chicago PD boss explains the importance of bringing Olinsky back

Tracy Spiridakos reunites with former Chicago PD star on Instagram

3 One Chicago characters who returned after dying onscreen

Chicago PD stars discuss shocking finale cameo: "It was really emotional"

CHICAGO P.D. -- Season: 3 -- Pictured: (l-r) top row; Marina Squerciati as Officer Kim Burgess, LaRoyce Hawkins as Detective Kevin Atwater, Brian Geraghty as Officer Sean Roman, Jesse Lee Soffer as Detective Jay Halstead, , Elias Koteas as Detective Alvin Olinsky, Amy Morton as Desk Sgt. Trudy Platt, Patrick John Flueger as Officer Adam Ruzek bottom row; Jon Seda as Detective Antonio Dawson, Jason Beghe as Sergeant Hank Voight, Sophia Bush as Detective Erin Lindsay -- (Photo by: Mark

The Chicago PD finale pulled off the biggest cameo of the season

CHICAGO, IL - NOVEMBER 09: Actor Elias Koteas attends a premiere party for NBC's 'Chicago Fire', 'Chicago P.D.' and 'Chicago Med' at STK Chicago on November 9, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/WireImage)

Alvin Olinsky will NOT be returning for Chicago PD season 11

CHICAGO P.D. -- "Breaking Point" Episode 517 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: Matt Dinerstein/NBC)

Chicago PD boss reveals why Elias Koteas left the show

CHICAGO, IL - NOVEMBER 09: Actor Elias Koteas attends a premiere party for NBC's 'Chicago Fire', 'Chicago P.D.' and 'Chicago Med' at STK Chicago on November 9, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/WireImage)

Alvin Olinsky will NOT be returning for Chicago PD season 11

CHICAGO P.D. -- "Into The Deep" Episode 1007 -- Pictured: (l-r) Jason Beghe as Hank Voight, Amy Morton as Trudy Platt -- (Photo by: Lori Allen/NBC)

The 3 best (and 3 worst) Chicago PD characters

WASHINGTON, DC - APRIL 30: Sophia Bush attends Paramount’s White House Correspondents’ Dinner after party at the Residence of the French Ambassador on April 30, 2022 in Washington, DC. (Photo by Shedrick Pelt/Getty Images)

4 Chicago PD characters who definitely won’t be back in season 10

CHICAGO P.D. -- "The Ghost in You" Episode 1013 -- Pictured: Jason Beghe as Hank Voight -- (Photo by: Lori Allen/NBC)

Chicago PD will pay tribute to Alvin Olinksy in new episode

CHICAGO P.D. -- "Closer" Episode 916 -- Pictured: Jason Beghe as Hank Voight -- (Photo by: Lori Allen/NBC)

Chicago PD: What are the characters’ badge numbers?

CHICAGO, IL - NOVEMBER 09: Actor Elias Koteas signs a poster as he attends a press junket for NBC's 'Chicago Fire', 'Chicago P.D.' and 'Chicago Med' at Cinespace Chicago Film Studios on November 9, 2015 in Chicago, Illinois. (Photo by Daniel Boczarski/Getty Images)

Chicago PD season 10: Will Elias Koteas return as Alvin Olinsky?

CHICAGO, IL - NOVEMBER 09: Actors Elias Koteas and Jason Beghe attend a press junket for NBC's 'Chicago Fire', 'Chicago P.D.' and 'Chicago Med' at Cinespace Chicago Film Studios on November 9, 2015 in Chicago, Illinois. (Photo by Daniel Boczarski/Getty Images)

Chicago PD alum Elias Koteas added to Goliath season 4 cast

CHICAGO P.D. -- "Confidential" Episode 511 -- Pictured: (l-r) Jason Beghe as Hank Voight, Elias Koteas as Alvin Olinsky -- (Photo by: Matt Dinerstein/NBC)

Chicago PD’s Elias Koteas starring in new SyFy series Cipher

CHICAGO P.D. -- "Profiles" Episode 516 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: Matt Dinerstein/NBC)

Should Chicago PD replace Alvin Olinsky?

CHICAGO P.D. -- Season: 5 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: James Dimmock/NBC)

Here’s why Chicago PD killed Alvin Olinsky

CHICAGO P.D. -- "Confidential" Episode 511 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: Matt Dinerstein/NBC)

5 reasons Chicago PD will regret killing Alvin Olinsky

CHICAGO P.D. -- "Profiles" Episode 516 -- Pictured: Elias Koteas as Alvin Olinsky -- (Photo by: Matt Dinerstein/NBC)

Elias Koteas’s birthday: Why we love Chicago PD’s Alvin Olinsky