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In this week's episode of "Rizzoli & Isles" (7 and 9 p.m., TNT), a dog trainer is killed and her dog is the prime suspect.

I have no inside information, but I refuse to believe the puppy dog did it.

Elsewhere on TV ...

""America's Got Talent" (7 p.m., NBC/Ch. 5): Twelve of the Top 36 acts perform at Radio City Music Hall in New York City.

Are You Smarter than a 5th Grader?" (7 p.m., Fox/Ch. 13): Jeff Foxworthy hosts.

"Zoo" (8 p.m., CBS/Ch. 2): The team discover a terrifying rat infestation when a cargo ship washes up off the coast of Massachusetts.

"Extreme Weight Loss" (8 p.m., ABC/Ch. 4): A 310-pound woman strives to lose weight after doctors tell her she's too heavy to have children.

"Escaping Polygamy" (8 p.m., LMN): A girl in a polygamous cult in Arizona reaches out for help.

"Proof" (8 and 10 p.m., TNT): Carolyn's personal life, professional life and proof investigations veer toward peril. (Season finale)

"Hollywood Game Night" (9 p.m., NBC/Ch. 5): The celebrity players are Scott Wolf, Mary Lynn Rajskub, David Walton, Mena Suvari, Kate Flannery and David Giuntoli.

"Next Step Realty: NYC" (10 p.m., ABC Family): Matt and David's scheme backfires.

"POV" (11 p.m., PBS/Ch. 7): The experiences of adolescent immigrants in Switzerland who are enrolled in an integration class, which is mandatory for anyone receiving government support, are chronicled.ng time for the students, as they must balance their dreams with reality.

"The Agent" (11 p.m,. Esquire): It's college football recruiting season.

"Tyrant" (11 p.m., FX): Barry prepares for a mission with depleted forces.

"Scream: The TV Series" (11 p.m., MTV): Emma uncovers a secret from the past.

"Another Period" (11:30 p.m., Comedy Central): Beatrice meets Thomas Edison; Blanche receives a strange letter from the Triangle Shirtwaist Factory.