The Secret World of the Very Young

John Ritter

Self-Host

Shelley Duvall

Ruth Gordon

Mary

Geri Jewell

Self

Emmanuel Lewis

Joan Lunden

Self

Annette O'Toole

Nancy Morgan

Self (as Nancy Morgan Ritter)

Tom Smothers

Self (as the Smothers Brothers)

Dick Smothers

Self (as the Smothers Brothers)

Sally Struthers

Mr. T

Self

Sahli Cavallaro

Self (as Dr. Sahli A. Cavallaro)

Richard A. Gardner

Self (as Richard A. Gardner)

Thomas Gordon

Self (as Dr. Thomas Gordon)

Virginia E. Pomeranz

Self (as Dr. Virginia E. Pomeranz)

Carly Ritter

Self

Jason Ritter

Self

Maurice Sendak

Self

Brian Sutton-Smith

(as Dr. Brian Sutton-Smith)

Taylor Groene

Hopping Boy (uncredited)

David Mendenhall

Max (voice) (uncredited)