msnbc.com Entertainment - Best bets: 'Titanic' sails again in 3-D By Gael Fashingbauer Cooper Some familiar faces at the movies and on TV this week. The "Titanic" sails again in 3-D, and the cast of "American Pie" gathers for a "Reunion." Here's our look at the week ahead in entertainment. Movies Does "Titanic" become any more unsinkable in 3-D? The famed 1997 movie gets an extra dimension this week. The doomed romance between Jack (Leonardo DiCaprio) and Rose (Kate Winslet) will unfold in front of a new generation who never saw the legendary ship sink on the big screen. Opens April 6. Those goofy kids from "American Pie" have grown up and have kids of their own, and they're staging an "American Reunion." Yes, that means Stifler (Seann William Scott), Stifler's mom (Jennifer Coolidge), and Eugene Levy as Jim's dad are all returning. We don't know if the famous pie makes an appearance, but don't bet against it. TV Kevin Clash, the talented puppeteer who voices "Sesame Street's" Elmo, had one childhood dream -- to work with his idol, Muppet creator Jim Henson. "If I could have climbed on the set of 'Sesame Street,' I would have tried it," Clash recalls. He made his dream come true, and "Being Elmo" takes a fascinating look at the man behind the Muppet. April 5, 10 p.m., PBS. You may have seen Dolores Hart in her full nun's habit on the Oscar red carpet. Hart once starred in films with Elvis Presley and others (she played smart freshman Merritt Andrews in 1960's "Where the Boys Are"). At age 23, she left Hollywood to enter religious life, and the documentary "God Is The Bigger Elvis" takes viewers inside her cloistered life. April 5, HBO, 8 p.m. DVD and Blu-ray Steven Spielberg's "War Horse" galloped across movie screens in 2011, and now it's on DVD and Blu-ray. When young Albert Narracott loses his beloved horse Joey to the British Army in World War I, he promises they'll one day be reunited. And though Joey must cross battlefields and trenches and fight alongside armies on different sides of the conflict, it's a Spielberg film -- don't think for a minute that Albie won't see that horse again. Out on DVD and Blu-ray April 3.