Full Cast — The Hardy Boys/Nancy Drew Mysteries (1977–1979)

Shaun Cassidy

Joe Hardy

Parker Stevenson

Frank Hardy

Pamela Sue Martin

Nancy Drew

Ed Gilbert

Fenton Hardy (uncredited) / Fenton Hardy

William Schallert

Carson Drew

Jack Kelly

Helms / Harry Hammond

Jean Rasey

George Fayne

Lisa Eilbacher

Callie Shaw

George O'Hanlon, Jr.

Ned Nickerson

Janet Julian

Nancy Drew

Robert Karnes

Sheriff King

Edith Atwater

Gertrude Hardy

Anne Lockhart

Fritz Feld

David Gates

Self

Kevin Brophy

Bobby Troup

Robin Mattson

Bobby Van

Val Avery

Johnny Sekka

Lorne Greene

Clive Revill

Philip Bronson

Paul Williams

Mills Watson

George Dunn

Kevin Tighe

Albert Carrier

Linda Dano

Edd Byrnes

Paul Owens

Kim Cattrall

Herb Voland

Pernell Roberts

Detective Superintendant Molly / Fire Chief Madison

Robert Wagner

Self

Howard Duff

Lloyd Kino

Lt. Andy Ho

Julius Harris

Angelo Rossitto

Ray Milland

Nehemiah Persoff

Vladimir

Pamela Franklin

Marla

Casey Kasem

Paul Hamilton

J.D. Cannon

Jason Fox

James Wainwright

Arlo Weatherly

Floyd Levine

Brandon