Michael J. Fox
Chance (voice)
Kevin Chevalia
Jamie Seaver
Veronica Lauren
Hope Burnford
Kim Greist
Laura Burnford-Seaver
Anne Christianson
Research Assistant
Frank Welker
Special Vocal Effects (voice)
Woody Eney
Forest Ranger 'Mark'
Rich Hawkins
Forest Ranger
Kit McDonough
Female Forest Ranger
Dorothy Roberts
Peter's Teacher
Caroll Spinney
Dog in Pound (uncredited)
Mark L. Taylor
Officer Kirkwood