My Super Sweet 16

By Tom Lewis Tonight's TV Junkie plan: "How I Met..", "Heroes", Letterman, Conan 10:30pm My Super Sweet 16 Presents: Exiled MTV - Season Finale 11:35pm Late Show With David Letterman CBS - Actress Sarah Silverman; the Teutuls ("American Chopper"); Ra Ra Riot performs.

By Tom Lewis 10:00pm Into the Unknown With Josh Bernstein Discovery - Josh Bernstein investigates a compelling new theory about Noah's Ark and the great flood 11:35pm The Late Show With David Letterman CBS - Actor Tracy Morgan; reality TV star Kim Kardashian; Solange performs.