Rich Sommer, Aaron Staton, Joel McHale, LeVar Burton

E! Networks

If there's one thing Joel McHale loves, it's guests—at his discreet Aspen condo, at his palatial Bel-Air shooting gallery, even on his famous Gas, Grass or Ass: Nobody Laughs for Free tour bus, but particularly on The Soup.

Thus, tonight's show has made Joel an extremely happy man, as no less than Mad Men stars Vincent Kartheiser, Rich Sommer and Aaron Staton join your host, along with the great LeVar Burton, who is not mad, but one hell of a man. Don't miss the action tonight at 10 p.m. ET/PT.