90210: As a new season opens in a new time period, an earthquake rips through Beverly Hills. Lori Loughlin, Tristan Wilds, Shenae Grimes, Trevor Donovan, Jessica Lowndes and Michael Steger star (8 p.m. KTLA).
Bachelor Pad: Chris Harrison and Melissa Rycroft host the season finale (8 p.m. ABC).
Gossip Girl: Season 4 begins as Blair (Leighton Meester) is surprised when Chuck (Ed Westwick) arrives in Paris with a new beauty (Clemence Poesy). Blake Lively, Chace Crawford, Penn Badgley and Michelle Trachtenberg star (9 p.m. KTLA).
Lie to Me: Tim Roth and Kelli Williams also star in the season finale (9 p.m. Fox).
World of Jenks: Filmmaker Andrew Jenks, 24, presents a memorable gallery of subjects as he captures on film a diverse spectrum of voices and personal stories in this new documentary-series (10 and 10:30 p.m. MTV).
Rizzoli & Isles: The killers of an undercover cop working a narcotics smuggling sting shift their deadly focus to the Boston homicide headquarters, trapping Maura, Jane and Frankie Jr. (Sasha Alexander, Angie Harmon, Jordan Bridges), in a fight for their survival in the season finale (10 p.m. TNT).
Quints by Surprise: 16 Months Later: The Joneses catch viewers up with their ever-changing world (9:30 p.m. TLC).
Lafayette: The Lost Hero: This one-hour film chronicles the life and career of the aristocrat who left France at the age of 19 and helped fight for America's freedom (10 p.m. KCET).
The 19th Wife: Adapted from David Ebershoff's best-selling novel, this drama stars Patricia Wettig as the wife of a polygamist and the prime suspect in his murder. Another wife (Chyler Leigh) in the sect summons her excommunicated son (Matt Czuchry) to help clear his mother's name. Jeff Hephner also stars (9 p.m. Lifetime).