1. Three brothers and their sister take a shot at rock stardom. 2. Youngsters want to run an amusement park. Ricardo Montalban, Herve Villechaize. Additional Cast ... Rob: Scott Baio. Willie: Jimmy Baio. Jody: Jill Whelan. Scooter: Keith Mitchell. Derrus: Jarrod Johnson. Aunt Andrea: Vernee Watson. Great Scott: Ted Lange. Lipscomb: Rip Taylor.