So You Think You Can Dance – 8/7c on Fox
Finally, a reason to watch SYTYCD: Katie Holmes. Mrs. Tom Cruise, who first showed off her moves on an episode of Eli Stone (during its second and final season), stops by for a song-and-dance cameo ("Get Happy") to celebrate the Dizzy Feet Foundation, which she co-created along with the show’s executive producer/judge Nigel Lythgoe, Dancing with the Stars judge Carrie Ann Inaba and director/choreographer Adam Shankman. Oh, yeah -- two of the top eight contestants will be going home on this, the 100th episode.