Thursdays still feel a little bare without 30 Rock, but news that James Marsden will be joining the cast for a six-episode arc makes mid-season seem a little bit closer. Marsden might be playing Liz’s love interest, which could be cute: Before he was (spoiler!) murdering townies in Straw Dogs, he was rubbing them the wrong way with his combination of nerdiness and muscles, not unlike Astronaut Mike Dexter might. Denise Richards also announced today that she’ll be guest-starring on 30 Rock, too, though that somehow seems less exciting. [Live Feed/THR]