House (8pm, Fox) - This could very well be the best 2 hours of television this week, if not this whole season. The "House" season 6 premiere picks up where season 5 left off: House is inside a mental institution recovering from his Vicodin addiction. The strong supporting cast tonight includes Andre Braugher as House's doctor, and Lin-Manuel Miranda as House's roomate. This is one you don't miss.
How I Met Your Mother (8pm, CBS) - CBS is all new tonight, and their sitcoms get things off to a strong start. On HIMYM, the gang finds out that Barney and Robin are secretly dating, and Ted begins his teaching career at Columbia. A brand new (and widely trashed) sitcom starring Jenna Elfman ("Accidentally on Purpose") follows at 8:30. Then it's "Two and a Half Men" and "Big Bang Theory" at 9 and 9:30.
Heroes (8pm, NBC) - The fourth season premiere of "Heroes" is a two-hour event tonight. Claire gets some unwanted attention at college thanks to an odd death.
Dancing with the Stars (8pm, ABC) - Expect this to win the night. The 9th season opens with 16 contestants, more than in any other season. Some of the stars competing this season are Donny Osmond, Tom DeLay, Melissa Joan Hart, and Michael Irvin.
CSI: Miami (10pm, CBS) - Season 8 begins tonight with Delko fighting for his life after being found unconscious in the Everglades at the end of last season. At some point, Horatio will dramatically remove his sunglasses and thoughtfully recall how the team came together during a case 12 years earlier, when Delko found a dead body in the trunk of a car.
Castle (10pm, ABC) - It will be so nice to see smart alecky Nathan Fillion again! In the 2nd season premiere of "Castle," Kate and Castle argue over his interference in her personal life, but put aside their differences to investigate a dead man found in a tree. Also, Castle has a book deadline looming.
Late Show with David Letterman (11:30, CBS) - President Barack Obama is Dave's guest tonight.