Law & Order Toronto: Criminal Intent is undergoing a significant casting change as production on Season 4 begins. Aden Young, who portrayed Detective Sergeant Henry Graff for the first three seasons, is leaving the show. No official reason has been provided for his departure.
Luke Kirby Joins the Cast
Emmy-winning actor Luke Kirby will replace Young, taking on the role of Detective Sergeant John Darcy. According to a press release, Darcy is introduced when he is called up from the Guns and Gangs unit to partner with Detective Sergeant Frankie Bateman, played by Kathleen Munroe, in Homicide.
Executive producer Tassie Cameron expressed enthusiasm about Kirby's addition: "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."
Returning Cast Members
Season 4 will also feature returning cast members Karen Robinson as Inspector Vivienne Holness, K.C. Collins as Deputy Crown Attorney Theo Forrester, Nicola Correia-Damude as pathologist Dr. Lucy Da Silva, and Araya Mengesha as internet sleuth Mark Yohannes.
Kirby's Background
Kirby is best known for his Emmy-winning portrayal of Lenny Bruce in The Marvelous Mrs. Maisel. He recently starred opposite Jennifer Garner in Apple TV's The Last Thing He Told Me and led the Prime Video series Etoile. His other credits include Disney+'s Out of My Mind and HBO's The Deuce.
A Proudly Canadian Series
Law & Order Toronto: Criminal Intent, based on Dick Wolf's classic format, is nominated for Best Drama Series and Best Actor at the upcoming Canadian Screen Awards. As the first international version of the Criminal Intent franchise with entirely new characters and cases, the show aims to tell stories that are "proudly Canadian," according to Cameron.
When the series launched in 2024, writers developed storylines from over 40 headlines, focusing on diverse crimes and settings across Toronto. Cameron noted, "It was about trying to make sure our criminals were different, and our crimes were different... we didn't want it all to be wealthy people getting killed in their Forest Hill mansions."
Season 2 tackled cases involving international students, CSIS, and Toronto's homeless crisis, while Season 3 drew inspiration from the Bruce McArthur murders. Munroe described the season as "fascinating" but acknowledged that some topics feel "almost too hot to touch."
