In a new episode of this freshman Canadian series, doctors at Bethune General Hospital are stumped by the splitting headache of a talented academic. Time is of the essence when the headache leads to a total breakdown and a violent seizure. Global, 8 p.m.
Still reeling from the recent death in his life, Aidan helps Kenny plan to get out of town in the new episode Ramona the Pest. Meanwhile, a ghost haunts Sally while she and Nora help Josh. Space, 8 p.m.
The battle is in full swing in this new two-hour episode. The coaches continue to help their teams reach their full potential, enlisting the help of some of the biggest stars in the music industry, including Miranda Lambert and the Band Perry. NBC, 7 p.m.
David Letterman: Jimmy Carter
Jimmy Fallon: Arnold Schwarzenegger, Carson Daly
Jimmy Kimmel: Jennifer Connelly, Rohan Chand
Craig Ferguson: Betty White, Brett Dalton
Seth Meyers: Kathie Lee Gifford & Hota Kotb, Kyle MacLachlan
Jon Stewart: Arianna Huffington
Conan O'Brien: Jeff Garlin, Andy Daly