"Behind the Camera: The Unauthorized Story of 'Diff'rent Strokes" (8 p.m., NBC): "Whatchu talkin' 'bout?" That laugh-line became a lifelong noose for Gary Coleman as a childhood sensation on NBC's popular sitcom "Diff'rent Strokes." His was a showbiz career that strangled him, then discarded him, before he was out of his teens. This TV film revisits the comedy hit and the personal tragedies it spawned, which, of course, weren't limited to Coleman's. A better-than-average chronicle of Hollywood's pitfalls, the film not only takes viewers behind the scenes, but also follows the lives of Coleman and his co-stars Todd Bridges and Dana Plato in the years after the series went off the air and their personal lives spiraled downward. Coleman and Bridges participated in the project and appear on-camera for interviews woven through the drama. Bobb'e J. Thompson stars as the young Gary Coleman.
"Dane Cook Vicious Circle" (9 p.m., HBO): In a comedy special taped in his hometown of Boston in April, the star of HBO's just-ended "Tourgasm" documentary series performs for thousands of fans.
"Lost Worlds: The Real Dracula" (9 p.m., History Channel): He was a medieval prince whose cruelty was legendary in 15th-century Romania. Nicknamed "the Impaler" for the way he dispatched enemies and prisoners, Count Vlad Dracula became legend in literature and film. Now a team of experts revisits Dracula's world, using computer graphics to illustrate his castles, his fortresses and his legacy.