TiVo Guide Week of January 3, 2011 *spoiler alert*

"Pretty Little Liars" Hanna is taken to the hospital in the wake of the hit-and-run, and her friends lean on each other and retrace everything that's happened to them since "A" entered their lives. Monday at 8 on ABC Family.

"Biggest Loser: Couples" Eleven teams of two begin the competition in the Season 11 premiere. The players must choose whether to work out with Bob and Jillian or two new unknown trainers. Contestants who opt for the new trainers receive four weeks of immunity and work out in a location away from the ranch. Tuesday at 8 on NBC.

"V" Riots erupt during the fourth day of the red sky; Ryan briefly reunites with his offspring before he returns to Earth; Marcus warns Anna about a scientist and conveys that there are doubts about her ability to lead in the Season 2 premiere. Tuesday at 9 on ABC.

"Grey's Anatomy" A mass shooting at a nearby college reopens some not-so-old wounds at the hospital. Meanwhile, Arizona returns to a welcome that's less than warm. Thursday at 9 on ABC.

"Shameless" The premiere of a series following the escapades of a hard-partying Chicago father (William H. Macy) who provides no guidance to his dysfunctional brood of six. First up: daughter Fiona has her purse snatched but manages to make the acquaintance of a handsome young man, and Lip discovers an unsettling secret about younger brother Ian. Sunday at 10 on Showtime.