Whatever Happened To The Cast Of Castle?
Emma Payne
Updated on March 08, 2026
Seamus Dever has been acting since at least the late 1990s. Before his stint as Kevin Ryan on "Castle," Dever could be spotted in CBS's many successful crime shows like "NCIS," "CSI: NY" and "CSI: Miami." Right before "Castle," he had an exceptionally busy 2008 with high-profile gigs including a 45-episode run on ABC's "General Hospital," an episode of the highly prestigious "Mad Men" from AMC, and seven episodes as Chris Ferlinghetti in Lifetime's "Army Wives."
One unique project Dever completed while "Castle" was still on the air was the comedy short "Sequestered," which also included co-star Jon Huertas. The two play wannabe bank robbers but get caught up in a poorly timed political discussion when they put on masks of significant political figures.
After "Castle" went off the air in 2016, Dever's landed a couple of voice acting gigs, one of which was in the ever-popular video game "Far Cry 5." Dever has also been seen in CBS's "MacGyver," "Titans" from HBO Max, "NCIS: Los Angeles," and "The Rookie."