“Glory Hounds” 7 p.m. to 9 p.m., Animal Planet (New)
This special spotlights military dogs, their bonds with their human comrades and their extraordinary duties in the heat of battle.
“Zero Hour” 7 p.m., ABC (New)
After a harrowing confrontation with Vincent in the Arctic, Hank (Anthony Edwards) and Beck search for the next clock and set their sights on India, where Hank makes a startling discovery.
“The Vampire Diaries” 7 p.m., CW (New)
Caroline worries about Elena’s state of mind, while Damon gives some sober news to Rebekah and is surprised at her reaction.
“The Big Bang Theory” 7 p.m. to 7:31 p.m., CBS (New)
Raj is put out when his date walks out in the middle of their evening, so he vows never to leave his apartment. Sheldon witnesses Penny’s acting abilities firsthand and is impressed, much to his surprise.
“Parks and Recreation” 7:30 p.m. to 8:31 p.m., NBC (New)
Leslie and Ben have two hours to complete a yearlong project. Later, Leslie is at a loss for words after the speech she prepared for a special event is stolen.
“Project Runway” 8 p.m. to 9:30 p.m., Lifetime (New)
The designers are tasked to fashion a performance outfit and red-carpet look for country music artist Miranda Lambert, who is also a guest judge.
“Person of Interest” 8:01 p.m. to 9:01 p.m., CBS (New)
Reese and Finch encounter a formidable foe when an attractive government operative goes on the run.
“Elementary” 9:01 p.m., CBS (New)
Holmes investigates when a wealthy man claims that his incurable illness was given to him on purpose. Then Holmes tries to teach Watson deductive skills by sending her to a suspicious dry-cleaning business.
“Scandal” 9:02 p.m., ABC (New)
Olivia’s staff members play matchmaker for a rising politician. Meanwhile, David Rosen thinks he’s being followed, and Fitz deals with a difficult hostage crisis. New love interest Jake gets persistent about asking Olivia out out on a date.
— Laura King
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