Luke Kirby Joins ‘Law & Order Toronto’ as New Detective in Season 4
A significant casting change is happening in the popular series “Law & Order Toronto: Criminal Intent.” Luke Kirby has been announced as the new detective for the upcoming season, taking over from co-lead Aden Young.
Cast Changes in “Law & Order Toronto”
Aden Young, who portrayed Det. Sgt. Henry Graff for three seasons, is exiting the show. His contract has concluded, allowing him to pursue new opportunities. Young expressed his appreciation for his time on the series. Representatives from Cameron Pictures, the production company, acknowledged his contribution to the character’s success.
Luke Kirby Joins as New Detective
Luke Kirby is set to join the cast of “Law & Order Toronto” as Det. Sgt. John Darcy. His character will transition from the guns and gangs division into homicide. Kirby is a well-known actor, having won an Emmy for his performance in “The Marvelous Mrs. Maisel.” He has an extensive resume that includes roles in:
- Dr. Death
- Take This Waltz, directed by Sarah Polley
- Rectify, a critically acclaimed series in which he starred alongside Young
Season 4 Details
Filming for Season 4 of “Law & Order Toronto” is currently in progress. This upcoming season will consist of ten episodes and is set to premiere this fall on Citytv. Alongside Kirby, returning cast members include:
- Kathleen Munroe
- Karen Robinson
- K.C. Collins
With these changes, fans of the series eagerly anticipate the new dynamics that Kirby’s character will bring to the show. This report was originally published by The Canadian Press on May 19, 2026.

