• 
  Ralph Nelson

  regizor

• 
  Stirling Silliphant

  scenarist

• 
  Claire Bloom

  Alice Kinnian
• 
  Cliff Robertson

  Charly Gordon
• 
  Lilia Skala

  Dr. Anna Strauss
• 
  Barney Martin

  Hank
• 
  Donald Warnock

  Attendee at Charly's Interview
• 
  Ruth White

  Mrs. Apple

• 
  Randee Lynne Jensen

  extra
• 
  Ralph Nelson

  Convention speaker
• 
  Dick Van Patten

  Bert
• 
  William Dwyer

  Joey
• 
  Leon Janney

  Dr. Richard Nemur
• 
  Edward McNally

  Gimpy (as Skipper McNally)
• 
  Dan Morgan

  Paddy