The Nature of Things
The new four-part documentary Wild Canada, co-produced by the team behind the BBC series Planet Earth and Human Planet, uses high-tech cameras and ambitious filmmaking techniques to capture an up-close look at Canada's natural wonders. CBC, 8 p.m.
Shirley, Jeff and Prof. Hickey discover a hidden trove of textbooks. The find causes some interesting events as the group contemplates how to use the stash to their advantage. NBC/Citytv, 7 p.m.
Sherlock Holmes and Joan Watson delve into a medical mystery in the new episode The Hound of the Cancer Cells. CBS/Global, 9 p.m.
David Letterman: Bryan Cranston
Jimmy Fallon: Julianna Margulies
Jimmy Kimmel: Darby Stanchfield
Craig Ferguson: Kristen Bell
Seth Meyers: Tilda Swinton
Jon Stewart: Anita Hill
Conan O'Brien: Ben Stiller