- Michael as Thomas
- Carlos as Edward
- Riff as Gordon
- Danny as Percy
- Homer (from The Simpsons) as Sir Topham Hatt
- Barney as Henry (non speaking role)
- BJ as James (non speking role)
- Ashley and Alisa as Annie and Clarabel (non speaking role)
- Principal Skinner (from The Simpsons) as The Stationmaster
- George Carlin as Narrator
- George Carlin: Homer Simpson sat in his office listening to the noise outside. The Passengers were angry. Principal Skinner came in.
- Principal Skinner: There's trouble at the school, Homer. Barney is sulking, there's no train and the passengers are saying this is a bad playground.
- Homer: Indeed!
- George Carlin: Said Homer Simpson.
- Homer: We cannot allow that.
- George Carlin: He found Riff, BJ and Barney looking very cross.
- Homer: Come along, Barney. It's time your train was ready.
- Riff: Barney's not going!
- George Carlin: Said Riff.
- Carlos: We won't shunt like smart human. That was Michael's job. We're important dinosaurs. You fetch our coaches and we will pull them. Dinosaurs don't shunt.