TiVo Guide Week of December 15, 2008 *spoiler alert*

"Heroes" Peter and Nathan face off after the battle with their father; Sylar detains Claire, Noah, Meredith and Angela at Primatech, and Mohinder may hold the key to rescuing Hiro. Monday at 9 on NBC.

"Intervention" Alcoholism is the subject. Monday at 9 on A&E.

"Worst Week" Sam helps Dick choose the perfect Christmas gift for Angela after discovering he gets her the same thing every year. But Sam's attempt to deliver the present doesn't bring Dick any tidings of comfort or joy. Monday at 9:31 on CBS.

"Biggest Loser: Families" The winner is revealed in the sixth-season finale. Also: The eliminated players return for a final weigh-in and compete for the at-home $100,000 prize; and the third finalist chosen by viewers is announced. Tuesday at 8 on NBC.

"According to Jim" Faced with the difficult task of buying Christmas presents for five kids, Jim tries to earn extra money by getting the twins cast in a film starring Steve Guttenberg (who plays himself), though the idea of the kids becoming movie stars is a flop with Cheryl. Tuesday at 9 on ABC.

"Momma's Boys" Three bachelors and their mothers meet 32 single women in the premiere episode of this dating show. The group settle into their cliff-side home, where they'll all live together, but an argument between one mom and a contestant quickly causes tension. Tuesday at 10 on NBC.

"Muppets Christmas: Letters to Santa" Song, dance, comedy and celeb guest turns intertwine in a holiday romp featuring the Muppets, who unwittingly prevent three letters from reaching Santa Claus. Kermit and his friends attempt to deliver the messages to the jolly fellow in an odyssey that involves a lonely girl, a taxi driver (Whoopi Goldberg), an amiable ticket agent (Uma Thurman) and a bitter security guard (Nathan Lane). Also appearing: Jane Krakowski, Jesse L. Martin, Petra Nemcova and Steve Schirripa. Wednesday at 8 on NBC.

"Spectacle" Former president Bill Clinton discusses his early career aspirations as a jazz saxophonist and how music has helped shape his life. Elvis Costello hosts. Wednesday at 9 on Sundance.

"Top Chef: New York" A holiday-themed outing is on the menu, with domestic guru Martha Stewart overseeing the quickfire challenge. Then, the cooks cater a Christmas cocktail party hosted by actress and guest judge Natasha Richardson, with proceeds benefiting AIDS research. Wednesday at 10 on Bravo.

"Ugly Betty" New Mode editor Wilhelmina tries to entice Betty to take a job as her assistant; Daniel's desire to keep his son in the U.S. hits a snag in the form of a custody battle; Christina finds reason to be wary of her estranged husband's motives. Thursday at 8 on ABC.

"Faith Hill, Joy to the World: A Soundstage Special Event" Faith Hill, accompanied by an orchestra and choir, performs selections from her 2008 "Joy to the World" Christmas album. Included: "A Baby Changes Everything," "Holly, Jolly Christmas," "Joy to the World!" "Little Drummer Boy," "O Come, All Ye Faithful," "Santa Claus Is Coming to Town" and "Silent Night." Thursday at 10 on PBS.

"Cathouse: Three Ring Circus" Another visit to the Moonlite Bunny Ranch, a Nevada brothel, includes a customer in a clown suit, employee superstitions and a wild birthday party. Thursday at 11 on HBO.

"Don't Forget the Lyrics!" Game-show host Chuck Woolery and Australian pop-music act Air Supply help two strangers compete together in a search for romance and a big payday. Friday at 9 on Fox.

"Whale Wars" In the Season 1 finale, the crew attacks a Japanese whaling ship again. After the battle, Watson claims to be injured and draws the media's attention to his cause. Friday at 9 on Animal Plan.

"Degrassi in Ecuador" Cast members travel to Ecuador to assist an indigenous community with health and sanitation issues and help build a school. Charlotte Arnold, Evan Williams, Sarah Barrable-Tishauer and Dalmar Abuzeid appear. Friday at 9 on The N.

"Christmas in Wonderland" A family's holiday wishes come true when the two children find a bag of money and spend it on presents, but then they discover it is fake and the counterfeiters want it back. Patrick Swayze, Chris Kattan, Tim Curry. Directed by James Orr, who cowrote the script with Wanda Birdsong Shope and Jim Cruickshank. Saturday at 8 on ABC Family.

"Our First Christmas" A newly blended family clash over conflicting Christmas traditions, and none of the kids are interested in compromising. Dixie Carter, John Ratzenberger, Julie Warner and Steven Eckholdt star. Directed by Armand Mastroianni. Saturday at 9 on Hallmark.

"A Very Merry Daughter of the Bride" A wedding planner (Joanna Garcia) sets out to stop her widowed mother's hasty romance and impending wedding. But she soon finds herself falling in love with a man (Luke Perry) just as quickly as her mother did. Saturday at 9 on Lifetime.

"Million Dollar Password" Julie Chen; Phil Keoghan. Sunday at 8 on CBS.

"Brotherhood" With Donatello in critical condition, Tommy appears to be next in line for Speaker of the House, which leads Freddie Cork to try to get on his good graces; Italian mobsters, the state police and the Feds are on Michael's trail while he tries to track down Colin. Sunday at 8 on Showtime.

"Summer Heights High" Ja'mie hatches a fund-raising scheme to make up for disappointing ticket sales for the Year 11 formal; Mr. G resorts to drastic measures when he feels his authority is undermined; and Jonah returns from suspension without much change in his behavior. Sunday at 10:30 on HBO.