Be My Valentine, Charlie Brown (8 p.m., ABC) – From 1975, Charlie keeps a vigil by the mailbox, hoping for a Valentine from the little red-haired girl. A second feature from 2002 has Charlie still pining for the little red-haired girl, and Snoopy penning the perfect love poem.
Grimm (9 p.m., NBC) – Nick reluctantly asks an old foe for help while investigating an arson that appears to have Wesen origins.
Glee (9 p.m., Fox) – Will takes a stand and teaches a lesson in tolerance to bullies in Vocal Adrenaline, while Rachel discovers her childhood home has been sold.
12 Monkeys (9 p.m., Syfy) – Cole and Dr. Railly battle the Army of the 12 Monkeys after they both discover the Night Room, an off-site, black ops lab that contains the virus that will one day destroy the world.
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Shakespeare Uncovered (9:30 p.m., UNC-TV) – The season ends with two new episodes. In the first, Kim Cattrall, who has twice played Cleopatra, meets other famed actresses who have played the Egyptian queen. At 10:30, Joseph Fiennes examines the many permutations of “Romeo and Juliet.”
Blue Bloods (10 p.m., CBS) – A mob informant returns to the city to testify in a case for Erin, and Danny and Baez are tasked with protecting him. Also, Frank and Mayor Pool engage in heated negotiations involving benefits for police officers.