LIFE 9:00 pm ET
Having lost to Abby and discovered a traitor out of her studio, Cathy is determined to rebuild her team and the trust she once had in it. Among the new dancers she reaches out to Abby Lee Dance Company nemesis Kaya "Black Patsy" Wiley and her daughter Nicaya in the new episode "An Apple a Day Keeps Abby Away."
CBS 8:00 pm ET
A death aboard a Navy ship is originally thought to have been caused by a massive storm, but as Gibbs (Mark Harmon) and the team investigate, it starts to look like a murder -- with a long list of suspects. McGee (Sean Murray) learns that his own estranged father, an admiral (Jamey Sheridan), was on board at the time of the incident in "Squall." Michael Weatherly also stars.
Sex: How It Works
NGC 8:00 pm ET
Through gripping real-life stories, new technology and cutting-edge computer graphics, this new special explores sex like never before, journeying from first times to playing the field, all the way to humankind's ultimate goal -- procreation.
Pretty Little Liars
ABCF 8:00 pm ET
The latest attack by "A" has potentially devastating consequences for Emily (Shay Mitchell) in this new episode. Alison's mom (Andrea Parker) gives Hanna (Ashley Benson) the DeLaurentis family parrot, who has some surprising things to say about Alison's last days. Aria (Lucy Hale) starts studying self-defense with an attractive instructor. Toby (Keegan Allen) shares a secret with Spencer (Troian Bellisario) in "Turn of the Shoe."
So You Think You Can Dance
FOX 8:00 pm ET
And the dance goes on. In the new episode "Meet the Top 20," host Cat Deeley will announce the names of the 10 male and 10 female finalists, who will then show their stuff in performance. Judges Nigel Lythgoe and Mary Murphy will just watch this time; this is just an opportunity for viewers to get to know the finalists.
NCIS: Los Angeles
CBS 9:00 pm ET
The team's investigation of a former terrorist group with one surviving member leads Kensi and Deeks (Daniela Ruah, Eric Christian Olsen) into the woods in "History." Chris O'Donnell, LL Cool J and Linda Hunt also star.
NBC 9:00 pm ET
It's down to the wire in this innovative singing competition, in which a panel of music industry insiders chose the contestants they wanted to mentor based strictly on how they sang, not how they looked. Tonight, one of those contestants is crowned the winner of the competition and receives a $100,000 cash prize and a record deal. Carson Daly hosts the season finale.
Hardcore Pawn: Chicago
TRUTV 9:30 pm ET
Back tonight with new episodes, this "Hardcore Pawn" spinoff is set in the Royal Pawn Shop, one of the oldest and largest such establishments in the Windy City. The owners are brothers Randy and Wayne Cohen, who don't agree on much ... except when it comes to what constitutes a good deal. And if there is a good deal involved, they're not shy about doing business with anyone.
FOOD 10:00 pm ET
In the new episode "Wheatgrass Roots," the chefs' first challenge is to see what they can do with a very earthy first basket, including chia seeds and dandelion greens. Then in the entree round, tempeh is the tempting center of every plate. And the two finalists get a local sweetener and a fresh berry from which to make delicious desserts.
Pretty Wicked Moms
LIFE 10:00 pm ET
Marci throws an extravagant costume party for Halloween in this new episode. When Meredith has trouble keeping up with the other women, Nicole N. and Emily take her under their wing and discover a shocking secret about her past in "Meredith's Makeover Madness."