"Once Upon a Time," 7 p.m., ABC (New)
Dr. Whale must operate to save the injured stranger, but some townspeople want the stranger to die, because they fear he could reveal their real identities to outsiders.
"Revenge" 8 p.m., ABC (New)
Daniel competes against an intense business adversary to land a deal that Victoria wants to stop.
"Masterpiece Classic," 8 p.m., PBS (New)
Tom and the pregnant Sybil arrive at Downton Abbey after an incident in Ireland that has left Tom a wanted man.
"Castle," 8 p.m., TNT
When things get tense with Beckett, Castle walks on the wild side of police work with a new partner, a tough gang unit detective who puts Castle in riskier situations.
"Shameless," 8 p.m., Showtime (New)
Fiona (Emmy Rossum) has second thoughts about loaning money to Meg, and a drunken Frank (William H. Macy) staggers home, where no one wants him until he proves to be the only one who can calm a fussy Baby Hymie.
"Girls," 8 p.m., HBO (New)
Hanna is unnerved by Adam’s creepy dirges that he posted online. Meanwhile, Marnie considers a new career path.
"Hawaii Five-0," 9 p.m., CBS (New)
Chin is kidnapped in the middle of the night and placed in a prison dressed as an inmate. He must escape before the other prisoners realize he isn’t one of them.
"Pioneers of Television" 9 p.m., PBS
The latest season (first aired Jan. 15) began with a spotlight on female comedians, including Phyllis Diller and Joan Rivers, and sitcom stars Lucille Ball, Marla Gibbs, Mary Tyler Moore and Betty White.
"Finding Bigfoot," 9 p.m., Animal Planet (New)
Now they’re getting the Girl Scouts involved when they ask a troop in Colorado to help them set bait for the legendary beast.
— Laura King
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