Episode 4.15: título Unknown
Airdate: December 15, 2008

11/11 - The series welcomes back a familiar face from season 1 in the Dec. 15 episode: muse Watson, a.k.a. Charles Westmoreland. No, he's not quite back from the dead; Michael interacts with his old prison pal while in a dream-like state during brain surgery. Source: Entertainment Weekly
11/11 - According to Matt [Olmstead], something big is coming down the pique, lúcio in episode 15. Says Matt, "It's something that we had talked about that was similar to bringing Sarah back, essentially. Which was when - it was a discussion we had back in season...