Natalie Wood as Cassie Barrett

Perry King as Dr. Edwin Alexander

Peter Haskell as Charlie Barrett

Shelley Long as Clara

Vivian Blaine as Helen

Marian Mercer as Eleanor

Juliet Mills as Tinkerbell

John Harkins as Father Dunhill

Barbara Tarbuck as Alice

Shane Butterworth as Greg Barrett

David Comfort as Steven Barrett

Tonya Crowe as Jenny Barrett

Robert Perault as Bobby Barrett

Bebe Drake as Gloria

Elsa Raven as Dalton

Peggy Rea as Pomeroy

Art Evans as Abdul

Donald Hotten as Ludwig

Sydney Lassick as Ernie

Delia Salvi as Norma

Eugene Elman as Dr. Proctor

Vernon Weddle as John

Laurence Haddon as Ted R.

Joe Lowry as Dr. Marshall

Hank Ross as Stockboy

Bob Corso as Orderly

Vincent Di Paolo as Waiter