Find out how it all ends for Sean Lowe as he faces his final decision in this two-hour season finale. A contestant on Season 8 of The Bachelorette, Lowe set out to find his soulmate, and now the choice is down to Catherine or Lindsay. ABC, 7 p.m.
Christine Lahti reprises her role as McGarrett's mother, Dorris McGarrett, in this rebroadcast. While she surprises her son with a visit, the team investigates the death of a polo player who quite literally lost his head. CBS/Global, 9 p.m.
The producers of this 21st-century reboot were forced to do some storyline scrambling after the death of Larry Hagman. This episode, aptly titled JR's Masterpiece, bids farewell to TV's best-ever villain and the iconic actor who played him. Bravo, 8 p.m.
George Stroumboulopoulous: TBA
Jay Leno: Halle Berry, Rachel Maddow
David Letterman: NYC Mayor Michael Bloomberg
Jimmy Kimmel: TBA
Craig Ferguson: George Hamilton
Jimmy Fallon: Justin Timberlake
The Daily Show: TBA
Conan O'Brien: Snoop Lion, Rorke Denver