What's On TV Tonight? - 8/21/2013

Credit: NBC

8:00 PM ET

Big Brother - Contestants compete in the veto competition. (CBS)

America's Got Talent - Performance recap. (NBC)

Melissa & Joey ("Teach Your Children") - Joey earns an unexpected reputation among the neighborhood mothers; Lennox and Zander want to skip college and tour the country; Ryder's vegan girlfriend experiences the joys of meat. (ABC Family)

8:30 PM ET

Baby Daddy ("All Riled Up") - Ben and Riley dance around their mutual attraction for each other; Bonnie and Tucker work out a routine and enter a competition to become the Rangers' new mascot. (ABC Family)

9:00 PM ET

America's Got Talent - Four acts move on to the semifinals; comic Tom Cotter. (NBC)

MasterChef ("Top 6 Compete") - The cooks must re-create popular dishes served at a fine-dining restaurant in downtown Los Angeles; the losing team must prepare a perfect plate of fried calamari with a side of marinara sauce. (FOX)

Royal Pains ("Game of Phones") - Hank and Don must bring Molly home safely; Divya visits her mother in Italy; Paige is overwhelmed with work. (USA)

Law & Order: UK ("Paternal") - A murdered man owes thousands in child support for his dying son. (BBC America)

Spell-Mageddon ("In Your Face") - On the hourlong game show, contestants must conquer distractions while spelling increasingly difficult words. (ABC Family)

Million Dollar Listing: Los Angeles ("Dire Contingencies") - Josh Altman endangers his relationship with another agent; Madison shops for a Texas couple looking for a beach house; Josh Flagg mentors a junior agent. (Bravo)

Love Thy Neighbor ("Love Thy Courage") - After being accused of infidelity, Danny fears for his safety. (OWN)

Paranormal Witness ("The Lynchville Secret") - A mother and her daughters take on a ghostly mayor from the wild west. (Syfy)

Here Comes Honey Boo Boo ("Get Her Chins Vacuumed") - Sugar Bear and the girls search for a tuxedo; Mama June relaxes at a spa, and gets her chins vacuumed. (TLC)

9:30 PM ET

Extreme Cougar Wives ("This Cougar is Very Dangerous") - Jane and her 27-year-old husband are Civil War reenactors; Loma wears leopard print bras and blonde wigs; Sheri has found her soul mate in a 26-year-old. (TLC)

Love Thy Neighbor ("Love Thy Family") - The family gathers at Hattie's during a storm. (OWN)

10:00 PM ET

NICK'S PICK: Camp ("The Wedding") - Mack offers to host a wedding for Grace's dads; Roger throws a bachelor party in an effort to attract more gay people to Ridgefield; Sarah suffers the social consequences of the scandal; Kip decides to pursue Marina. (NBC)

ABC's The Lookout - Tracking down Ephren Taylor; author Dave Zinczenko compares the nutritional value of summer treats; avoiding germs during a vacation. (ABC)

Duck Dynasty ("So You Think You Can Date?") - The guys and their wives coach Martin in romance for an upcoming date. (A&E)

Broadchurch - Fingerprints at the murder scene lead Hardy and Miller to a surprising suspect; Steve Connelly has a message for Beth. (BBC America)

The Bridge ("Destino") - The EPPD corners their prime suspect; Charlotte questions Ray's intentions; Linder crosses the border and takes on his most difficult case yet. (FX)

Necessary Roughness [SEASON FINALE] ("Sympathy for the Devil") - Dr. Dani searches for her missing client; the V3 scandal comes to a head; TK may be benched for the big game; Nico has a surprise visitor. (USA)

Top Chef Masters ("Restaurant Wars") - The chefs open Los Angeles-themed restaurants. (Bravo)

Futurama ("Murder on the Planet Express") - The crew becomes trapped on the ship with an alien creature. (Comedy Central)

Mystery Diners ("Too Many Cooks") - The owner of Bistro Bordeaux in Evanston, Ill., investigates several complaints about his new chef. (Food Network)

The Challenge: Rivals II ("Crossing Jordan") - Frank lashes out at Jordan, causing an uproar; a flirtation leads to a surprise hook-up; teams must trust each other. (MTV)

I'm Having Their Baby ("Alysia; Christina") - Alysia fears her illness and a fifth child will be too big of a burden; Christina intends to place her baby with her half-sister and her wife. (Oxygen)

Joe Rogan Questions Everything ("Real Close Encounters") - Joe Rogan wears a lot of hats -- stand-up comedian, podcast host, and mixed-martial-arts broadcaster among them -- but it's a tin-foil hat that he wears in this unscripted series, as he looks to uncover the truth behind various theories and mysteries. (Syfy)

Hot in Cleveland ("Corpse Bride") - Melanie gets her dream engagement ring; Joy deals with family issues; Victoria tests a new product; Elka and Mamie work on jokes for a roast. (TV Land)

Couples Therapy - Joe and Abbey choose to leave the house; the couples go on final dates to discuss their futures; Dr. Jenn leads a final process. (VH1)

10:30 PM ET

The Exes ("The Hand That Robs the Cradle") - Holly dates a younger man; Phil and Eden become friends with benefits; Stuart convinces Haskell to pursue a woman he is interested in. (TV Land)

Deal With It [SEASON FINALE] ("Nut Job") - A contestant brushes her teeth at the table and talks with imaginary people; a wife must tell her husband he's not the father of their child. (TBS)

Modern Dads [SERIES PREMIERE] ("Piece of Cake") - Rick plans a celebration for the twins' first birthday, with a little help from the guys; Stone considers getting a vasectomy. (A&E)

11:00 PM ET

The Soul Man ("Music and Lyric") - Lyric samples one of Boyce's songs, making Boyce and Lolli question their parenting abilities; Stamps and Kim's relationship heats up. (TV Land)

LATE NIGHT

Chelsea Lately features Kathryn Hahn, promoting the upcoming film Afternoon Delight; John Caparulo; Jen Kirkman; James Davis. (11:00 PM, E!)

Late Show With David Letterman welcomes Actress Tina Fey; humanitarian Hugh Evans; Valerie June performs. (11:35 PM, CBS)