Correspondent Miles O'Brien revisits the question of what caused Hurricane Sandy in the new documentary Megastorm Aftermath. He explores whether it was a freak combination of weather systems or the direct result of a changing climate. PBS, 8 p.m.
Republic of Doyle
When Jake sets out to bring a bail-jumper back to the city, he realizes he may have met his match in this new episode. His quest is complicated even further by the interference of an old nemesis. Stuart Margolin guest stars. CBC, 9 p.m.
American Horror Story: Coven
TV's creepiest drama returns for a third season, this time set in New Orleans and focused on the world of witchcraft. Jessica Lange leads the cast, and is joined by fellow Oscar winner Kathy Bates and best-actress nominee Angela Bassett. FX Canada, 9 p.m.
Jay Leno: Whitney Cummings, Ann Romney
David Letterman: Lucy Liu, Mark Jacobson
Jimmy Kimmel: Ethan Dizon & Skylan Brooks, Arctic Monkeys
Craig Ferguson: Sean Hayes
Jimmy Fallon: Alan Rickman, Chloe Grace Moretz
The Daily Show: Michael Fassbender
Conan O'Brien: Steve Martin, Edie Brickell