Collecting tidbits announced over the last few weeks: Nathan Fillion, who played captain Mal Reynolds on Firefly, has signed on for a recurring role on Buffy The Vampire Slayer. Gina Torres, who played the second in command on Firefly, has signed on for a recurring role on Angel. Finally, Alan Tudyk, who played the pilot on Firefly, has been cast in a film adaptation of Asimov’s I, Robot.