Who Do You Think You Are (8pm, NBC) - Rob Lowe's search of his ancestry leads to Germany and the Library of Congress. Lowe finds an unexpected connection to the Revolutionary War and America's founding fathers.
Nikita (8pm, CW) - A plot to bankrupt Percy backfires and Percy snatches Birkhoff's life savings instead. Birkhoff is then arrested by the FBI while trying to retrieve it, and Nikita needs to free him before Division gets ahold of him.
Whale Wars: Viking Shores (9pm, Animal Planet) - The premiere of new "Whale Wars" spinoff following the marine-conservation group Sea Shepherd on a new campaign to stop the hunting of pilot whales in the Faroe Islands in the North Atlantic Ocean. The photo on the right isn't touched up. That's blood in the water.
Fringe (9pm, Fox) - The Fringe teams from both worlds are united by a common cause, and new developments are linked to the children from the Cortexiphan experiments.
In Plain Sight (10pm, USA) - The FBI keeps an eye on Mary after her father goes on the lam seeking vengeance. Mary tries to lose the agents tailer her in order to track her father down herself.
Blue Bloods (10pm, CBS) - A leak in the NYPD endangers a Russian mob trial witness whom Danny and Jackie are assigned to protect. Elsewhere, Erin is offered a job as deputy mayor, which would pair her with her father.