The Million Second Quiz
Ryan Seacrest hosts as contestants take part in a trivia game like no other -- they test not only their knowledge, but also their endurance as they compete in trivia contests for 12 straight days in an hourglass-shaped house in Manhattan. NBC/Citytv, 7 p.m.
A summer of scandalous drama wraps up in this season finale. A birthday road trip takes an unexpected and upsetting turn, and April comes to some conclusions about the men in her life. ABC, 8 p.m./CTV, 9 p.m.
Scott and Sheldon head out in search of unique items to decorate Canadian country star George Canyon's new home. There's a bet involved, and either Canyon or Scott is going to have to hand over a prized guitar. History, 7 p.m.
George Stroumboulopoulous: Michael J. Fox
Jay Leno: Martin Short, Meghan McCain
David Letterman: Ricky Gervais
Craig Ferguson: Alice Eve
Jimmy Fallon: Steve Harvey, the cast of Duck Dynasty
Conan O'Brien: Patton Oswalt