Best tube bets this weekend Friday: Sarah Palin on ABC's '20/20;' Saturday: UConn versus Notre Dame on NBC; Sunday: 'Curb Your Enthusiasm' finale   These years later, Martha opens up And, yes, Stewart is still angry over her prosecution, she tells ABC's 'Nightline' in a wide-ranging, dish-filled interview   Youngblood: 'Twilight' star meets Dave Robert Pattinson, one hot boy on the chat circuit ahead of Friday's opening, drops by CBS's 'Late Show with David Letterman'   For 'Melrose Place,' one last big hope Heather Locklear appears in a guest stint, and the hope is she'll steam up ratings for the CW series as she did for the original   The big meet-up: Oprah and Sarah Palin Will sparks fly when the two women sit down to chat about the ex-candidate's campaign tell-all, 'Going Rogue: An American Life?'   Best tube bets this weekend Friday: MLS showdown on ESPN2; Saturday: Syfy's original movie 'Ice Twisters;' Sunday: Patriots-Colts on NBC's 'SNF'   Sweeps special: A 'CSI' round robin In a first, a storyline plays across all three versions of the long-running CBS series, its final segment airing on the original   'The real story behind the real thing' CNBC promises to reveal secrets about Coca-Cola in a profile of the soft drink giant as it searches for the next hit beverage   Celebrating that bit of Elmo in us all 'Sesame Street' airs the premiere of its 40th season, with First Lady Michelle Obama appearing to teach kids about gardening   On 'Gossip Girl,' three's not a crowd But expect a huge crowd tuning into the steamy teen soap to catch a threesome, thanks in part to thundering by the PTC next >>