When the Mystery Machine comes to life and begins driving by itself, the gang tries to find the clues, which leads them to The Mystery Kids, the band who formerly owned the Mystery Machine.

A big star's debut concert in new Las Vegas is sabotaged by a ghost from old Las Vegas.

An amusement park full of extreme rides is haunted by the Roller Ghoster, a speed-happy spectre who frightens patrons off the thrill rides.