The August 25-28, 2011 Fan Expo has announced the Sci Fi guests and they include actors Lee Majors (Steve Austin from Six Million Dollar Man), Tom Felton (Draco Malfoy from Harry Potter), Barbara Eden & Larry Hagman (Jeannie & Anthony Nelson from I Dream of Jeannie), Kevin Sorbro (Hercules), Nichelle Nichols (Uhuru from Star Trek) and Marina Sirtis (Deanna Troi from Start Trek). Some of these guys will be known to the younger set through repeats and some will have watched these shows when they were first on the air. I know that we sometimes still make the sound used when the Six Million Dollar Man was in action from 1974 to 1978 (slow motion action sure, but action none the less).
You can find more guests on their website and keep checking back as they release the guests from other genres that will be coming to the show. The major brands at the Fan Expo are Comic, Sci Fi, Horror, Anime and Gaming. And get your cosplay costumes ready to go and show.