How I Met Your Mother: Barney (Neil Patrick Harris) bonds with his dad (John Lithgow) in this new episode (8 p.m. CBS).
Chuck: Chuck and Sarah (Zachary Levi, Yvonne Strahovski) seek help from Sarah's con-man father (Gary Cole) in this new episode (8 p.m. NBC).
House: Masters (Amber Tamblyn) reaches a crossroads and must decide if she wants to be a surgeon or officially join House's (Hugh Laurie) team in this new episode (8 p.m. Fox).
Hawaii Five-0: Sean Combs, a.k.a. Diddy, guest stars in this new episode (10 p.m. CBS).
Law & Order: LA: When a high-speed chase ends, Morales and Jaruszalski (Alfred Molina, Corey Stoll) discover that the vehicle they were pursuing has no driver and a dead passenger (10 p.m. NBC).
20/20: In the new episode "William and Catherine: A Modern Fairytale," Barbara Walters offers a peek into the storybook romance of Prince William and Kate Middleton (10 p.m. ABC).
Urban Legends: Mystery/anthology series returns for a new season (10 p.m. Syfy).
Royal Wedding of a Lifetime: This six-part series tells the story of Prince William and bride-to-be Kate Middleton. Up first: the story of how the couple met (11 p.m. Lifetime).
Games of the North: Playing for Survival: In this new special, four modern Inuit athletes compete in various events across the Arctic (10:30 p.m. KOCE).
William & Kate: Nico Evers-Swindell and Camilla Luddington star as Prince William and Kate Middleton in a made-for-TV dramatization of their relationship (9 p.m. Lifetime).
Basketball: NBA playoffs (4 and 6:30 p.m. TNT).
Baseball: The Angels visit the Texas Rangers (5 p.m. FSN); the Atlanta Braves visit the Dodgers (7 p.m. FS Prime).