Law & Order: Toronto: Criminal Intent Undergoes Major Cast Shakeup for Season 4

The Citytv drama Law & Order: Toronto: Criminal Intent is making significant changes to its lineup heading into its fourth season.

Aden Young, who has anchored the series as Detective Sergeant Henry Graff from its debut, is stepping away from the show. According to Variety, the actor and production are parting ways on amicable terms.

Filling the vacancy is Luke Kirby, best recognized for his Emmy-winning performance on The Marvelous Mrs. Maisel. Kirby will portray Detective Sergeant John Darcy, a character being brought up from Guns & Gangs to work alongside Detective Sergeant Frankie Bateman, played by Kathleen Munroe, in the Homicide division.

Executive producer Tassie Cameron praised the casting decision in a statement: "From the moment we began imagining this next chapter, Luke stood out as the ideal choice. He brings a sharp intelligence and emotional depth that perfectly aligns with the kind of storytelling Law & Order Toronto: Criminal Intent is known for. His work is grounded, unpredictable, and deeply character-driven, which makes Detective Darcy an immediate and fascinating presence on our team. We're incredibly excited to welcome him to the series."

The specifics of how Young's departure and Kirby's arrival will unfold on screen remain to be seen. Season four is currently in production and will debut this fall on Citytv.