Shark Tank (8pm, ABC) - Redneck millionaire Jeff Foxworthy (left) takes a seat with the Sharks tonight. Also, Vincent Pastore, who played Big P-, uh, make that Salvatore Bonpensiero on 'The Sopranos,' pitches an idea.
Who Do You Think You Are (8pm, NBC) - In the second season finale, actress Ashley Judd explores her ancestry, zeroing in on her colorful paternal great grandmother and finding connections to the Union Army and America's first settlers.
Blue Bloods (10pm, CBS) - Linda's runway-model niece and a reporter are poisoned at a fashion show. Designer Marc Bouwer appears as himself.
Merlin (10pm, Syfy) - The Season 3 finale finds Camelot crumbling under the control of Queen Morgana and Morgause's immortal army. While Arthur, Lancelot, Elyan, and Percival prepare for a counterattack, Merlin rushes to retrieve the Excalibur sword from the Lake of Avalon. This season finale leaves you more time to watch ...
Camelot (10pm, Starz) - Arthur's pursuit of Guinevere proves unrewarding. Also, Leontes and Kay recruit a new warrior they believe they can trust, and Arthur and Merlin contemplate a dinner invitation to Morgan's castle.
Real Time with Bill Maher (10pm, HBO) - Guests are Colin Quinn, Katty Kay, Eliot Spitzer, and Andrew Sullivan.
Whatever, You're So Wrong (11pm, Hallmark) - Martha Stewart's daughter Alexis Stewart and Jennifer Koppelman Hutt in a new late night talk show where they tackle topics about everyday life as well as serious issues. The third season of 'Whatever, Martha!' (also with Alexis and Jennifer) debuts at 11:30pm. In that show, the two women basically critique old Martha Stewart episodes (and make fun of Martha herself).