Heroes and villains from the worlds of horror, fantasy and sci-fi shared the stage at Spike TVs annual Scream Awards. More television event than traditional awards ceremony, the Scream Awards were presented in an amphitheater built on the Universal Studios back lot just for the occasion. The top honorees were Harry Potter, Darth Vader, Nicolas Cage, Pee Wee Herman and Robert Downey Jr. Resembling a psychedelic circus, one side of the stage was a life-sized dollhouse populated by costumed characters, the other a staircase topped by a giant keyhole, and in the middle was a lake that lit up with fire. Fans picked the night’s winners and also filled the makeshift theater for the 2½ -hour presentation, which is set to air Tuesday as a two-hour special on Spike TV and VH1. The show literally began with a scream, opening with a giant crane carrying a woman across the sky, then dropping her into the fiery lake. Blasts of fire and various stunts continued throughout the program. Potter took the night’s top prize. The eight-part film franchise was named the Ultimate Scream. “The Dark Knight Rises” cast members Joseph Gordon-Levitt, Anne Hathaway and Gary Oldman, accepted the Most Anticipated award for their upcoming film. Audience members were given glow sticks before the winner was announced, and when “Potter” star Daniel Radcliffe accepted the prize by video from New York, fans there were waving the same lights. Co-star Ralph Fiennes, who played Lord Voldemort, also appeared by video to accept an award for favorite villain. Vader, though, won the Ultimate Villain award. “Star Wars” creator George Lucas presented the Sith Lord with his prize.