Nathan Fillion in particular has brought fellow Firefly alums to his various shows, and the first season of The Rookie managed to incorporate Sean Maher, who played Dr. Simon Tam on Firefly and in the Serenity movie.
Firefly fans, prepare for another cast reunion courtesy of The Rookie!
Is it one of those who already reunited with Fillion on Castle, or somebody else?
So, who of the original series is coming to The Rookie in Season 2?