On screen
Cast
101 credited performers
Patty Duke
Patty Lane / Cathy Lane
William Schallert
Martin Lane
Jean Byron
Natalie Lane
Paul O'Keefe
Ross Lane
Eddie Applegate
Character not listed
Jeff Siggins
Alfred (uncredited)
John Spencer
Henry
Skip Hinnant
Character not listed
Robyn Millan
Character not listed
Kathy Garver
Character not listed
David Doyle
Character not listed
Judith Lowry
Character not listed
John McGiver
Character not listed
Marcia Strassman
Character not listed
Bruce Kirby
Character not listed
Tommy Farrell
Character not listed
Flip Mark
Character not listed
Neva Patterson
Character not listed
Susan Anspach
Character not listed
Ronnie Schell
Peter Mason
Joe Silver
Man (voice)
Scott Glenn
Character not listed
Margaret Hamilton
Character not listed
John C. Becher
Character not listed
Doris Belack
Miss Grey
John Randolph
Character not listed
Troy Donahue
Character not listed
Harold Peary
Character not listed
James Brolin
Character not listed
Kevin Coughlin
Character not listed
Judy Carne
Character not listed
Charles Nelson Reilly
Character not listed
Daniel J. Travanti
Character not listed
Gary Morgan
Character not listed
Alan Mowbray
Character not listed
Frances Heflin
Character not listed
Reta Shaw
Character not listed
Joan Copeland
Character not listed
Aron Kincaid
Character not listed
Dana Elcar
Character not listed
Jean-Paul Vignon
Character not listed
Bobby Vinton
Character not listed
Jeremy Clyde
Character not listed
Clint Howard
Character not listed
Frank Sinatra Jr.
Character not listed
Rae Allen
Character not listed
Bobby Diamond
Character not listed
James Coco
Character not listed
John Pleshette
Character not listed
Michael Gordon
Character not listed
Phyllis Coates
Character not listed
Sarah Seegar
Character not listed
Paul Reed
Character not listed
Amzie Strickland
Character not listed
Byron Foulger
Character not listed
Jean Stapleton
Character not listed
Peggy Rea
Character not listed
Dorothy Peterson
Character not listed
Beverly Washburn
Character not listed
K.T. Stevens
Character not listed
Kim Carnes
Character not listed
Conrad Yama
Character not listed
Helen Kleeb
Character not listed
Sal Mineo
Character not listed
Roger C. Carmel
Character not listed
Albert M. Ottenheimer
Character not listed
John Marriott
Character not listed
Jane Connell
Character not listed
Estelle Parsons
Character not listed
Robert Q. Lewis
Character not listed
Heywood Hale Broun
Character not listed
Patricia Bosworth
Character not listed
George Gaynes
Character not listed
David Hurst
Character not listed
Mike Road
Character not listed
Don Diamond
Character not listed
Paul Lynde
Character not listed
Milton Frome
Character not listed
William Christopher
Character not listed
Phil Leeds
Character not listed
Willis Bouchey
T. J. Blodgett
Jean-Pierre Aumont
Character not listed
Sorrell Booke
Character not listed
Hildy Parks
Character not listed
Chad Stuart
Character not listed
Susan Tyrrell
Character not listed
Milton Parsons
T. J. Blodgett
Ruth Kobart
Character not listed
Barney Martin
Character not listed
Chris Gampel
Character not listed
Arnold Soboloff
Character not listed
Sammy Davis Jr.
Character not listed
Peter Lawford
Character not listed
Gerald Peters
Character not listed
Ilka Chase
Character not listed
Jon Stone
Talent Scout
Scott McCartor
Willy
Robert Goulet
Robert Goulet
C. Lindsay Workman
Principal
Ken Lynch
Lt. Gregory
Stanley Farrar
Dr. Fenneman