The Rookie has featured many famous guest stars over the years, including Alan Tudyk, who hasn't appeared in the show since season 4 but could return in season 8 under one condition.

Tudyk's first appearance on The Rookie came in Season 2, Episode 8, "Clean Cut", as Ellroy Basso. The episode plays out on John Nolan's (Fillion) birthday, which starts out with him off duty.

Tudyk's first appearance on The Rookie came in Season 2, Episode 8, "Clean Cut", as Ellroy Basso. The episode plays out on John Nolan's (Fillion) birthday, which starts out with him off duty.