Tuesday's TV Highlights: ‘If You Really Knew Me’ at 11 p.m. on MTV.
Losing It With Jillian: Jillian tries to make a father see that his own weight issue is a bad example for his pre-diabetic son and hopes to start the close-knit California family on a new way of life in the season finale of the unscripted series (8 p.m. NBC).
Pretty Little Liars: The girls deal with the aftermath of the homecoming dance in this new episode (8 p.m. ABC Family).
Downfall: The game show offers its season finale (9 p.m. ABC).
Gene Simmons Family Jewels: The unscripted series marks its 100th episode with Gene going on tour with KISS (9 p.m. A&E).
Warehouse 13: When an artifact meant for the Warehouse turns up in the small town next door, the team finds itself in the middle of a B-movie meltdown, complete with cowboys, gladiators, sci-fi robots and beach-storming Marines. Eddie McClintock and Joanne Kelly star in this new episode (9 p.m. SyFy).
Teen Mom: The unscripted series returns for a new season (10 p.m. MTV).
Double Exposure: Indrani and GK grow closer during a shoot with “90210” star AnnaLynne McCord (11 p.m. Bravo).
Fighting Back: Stories From the Spill: This new special reveals how people are coping with the Gulf of Mexico oil spill (7 and 10 p.m. National Geographic).
KISSteria: The rock icons give a surprisingly candid look behind the scenes of their “Alive 35” mini-tour of Australia, which Gene Simmons and Paul Stanley decided to undertake with just one week's notice (10 p.m. A&E).
The Taking of Pelham 123: Thirty-five years after John Godey's novel about a New York subway train hijacking first was filmed, director Tony Scott gave the tale a more action-packed rendering. John Travolta and Denzel Washington star in the 2009 thriller (7:10 p.m. Starz).
Baseball: The Angels visit the New York Yankees (4 p.m. FSN); the San Francisco Giants visit the Dodgers (7 p.m. KCAL).
Photo: Brad BarketPictureGroup / MTV