“How I Met Your Mother,” 7 p.m., CBS (new)
It was only a matter of time. Barney finds out about Ted's feelings for Robin, and chaos ensues at the best-man poker game.
“Bones,” 7 p.m., Fox (new)
After a plan to catch Pelant doesn't work, he retaliates by killing someone close to Booth.
“Hart of Dixie,” 7 p.m., CW (new)
The third season starts with Zoe returning to Bluebell to get a referral from Brick, but he insists that she help him find George.
“Sleepy Hollow,” 8 p.m., Fox (new)
Ichabod (played by Tom Mison, above) helps Abbie search for her sister who escaped from a psychiatric hospital.
“Beauty and the Beast,” 8 p.m., CW (new)
Vincent is a changed man in the premiere of the second season.
“Hostages,” 9 p.m., CBS (new)
While Duncan is threatening Ellen, she meets his daughter and gains insight into his life.
“Castle,” 9:01 p.m., ABC (new)
The 12th precinct investigates the death of a former child star, but Beckett and McCord hijack the case.