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).