Dr. Jack Hammond has best chances to become medical superintendent in the clinic. So he's completely absorbed in his work and has no understanding for his teenage son Chris' problems with school. By accident one of them drinks a brain-exchanging serum, and it switches their identities. This leads of course to extraordinary complications in school and at work, but also to insight in the problems and feelings of each other.

Dudley Mooreas Dr. Jack Hammond / Chris Hammond
Kirk Cameronas Chris Hammond / Dr. Jack Hammond
Margaret Colinas Ginnie Armbruster
Catherine Hicksas Dr. Amy Larkin
Patrick O'Nealas Dr. Larry Armbruster
Sean Astinas Clarence / Trigger
Camille Cooperas Lori Beaumont
Micah Grantas Rick Anderson, Lori's Boyfriend
Skeeter Vaughanas Medicine Man
Jack N. Green