Man from Atlantis

Patrick Duffy

Mark Harris (13 episodes)

Belinda Montgomery

Dr. Elizabeth Merrill (13 episodes)

Alan Fudge

Dr. Crawford (13 episodes)

J. Víctor López

Cetacean crew (as J. Victor Lopez) (8 episodes), Cetacean crew (as Victor Lopez) (1 episode), Cetacean crew( as J. Victor Lopez) (1 episode)

Jean Marie Hon

Cetacean crew (9 episodes)

Anson Downes

Cetacean crew (6 episodes)

Victor Buono

Mr. Schubert (5 episodes)

Robert Lussier

Brent (4 episodes)

Ted Neeley

Jack Muldoon (2 episodes)

Pernell Roberts

Clint Hollister (1 episode)

Noble Willingham

Artemus Washburn (1 episode)

Arlene Martel

Carla(as Tasha Martell) (1 episode)

Jamie Smith-Jackson

Bettina Washburn (as Jamie Smith Jackson) (1 episode)

René Auberjonois

Havergal (1 episode)

John Shea

Romeo (1 episode)

Lisa Eilbacher

Juliet (1 episode)

Scott Porter

Mercutio (1 episode)

Ahna Capri

Louisa (1 episode)

Val Avery

Lew (1 episode)

Michele Carey

Belle (1 episode)

Ted Cassidy

Canja (1 episode)

Pat Morita

Moby (1 episode)

Mel Scott

Bert Davis (1 episode)

Lyman Ward

Clavius (1 episode)

Richard Gautier

Duke (as Dick Gautier) (1 episode)

Larry Breeding

Buddy O'Toole (1 episode)

Dee Wallace

Hot Dog Stand Owner (as Dee Wallace-Stone) (1 episode)

Michael Strong

Hugh Trevanian (1 episode)

Neville Brand

Stringer (1 episode)

Timothy Scott

Caine (1 episode)

Laurette Spang

Amanda Trevanian (1 episode)

Lisa Blake Richards

Jenny Reynolds (as Lisa Richards) (1 episode)

Carol Miyaoka

Siren (1 episode)

Sharon Farrell

Charlene Baker (1 episode)

Billy Barty

Moxie (1 episode)

Anthony James

Summersday (1 episode)

Donna Garrett

Student (1 episode)

Sydney Lassick

(1 episode)

Carole Mallory

Vicki (1 episode)

Victoria Huxtable

Juliette Schubert (as Vicky Huxtable) (1 episode)

J. Víctor López

Cetacean crew (as J. Victor Lopez) (1 episode)

Kareem Abdul-Jabbar

Thark (1 episode)

Gary Owens

Blaise Mullen (1 episode)

Harvey Jason

Dashki (1 episode)

Herbert F. Solow

Producer (13 episodes)

Mayo Simon

Director (13 episodes)

David Moessinger

Director (2 episodes)

Virgil W. Vogel

Director (2 episodes)

Barry Crane

Director (1 episode)

Robert Douglas

Director (1 episode)

Dann Cahn

Director (1 episode)

Paul Krasny

Director (1 episode)

Edward M. Abroms

Director (1 episode)

Dennis Donnelly

Director (1 episode)

Harry Harris

Director (1 episode)

Richard Benedict

Director (1 episode)

Michael O'Herlihy

Director (1 episode)

Herman Miller

Writer (2 episodes)

Stephen Kandel

Writer (2 episodes)

Michael I. Wagner

Writer (2 episodes)

Larry Alexander

Writer (2 episodes)

Larry Alexander

Writer (1 episode)

Peter Allan Fields

Writer (1 episode)

Shimon Wincelberg

Writer (1 episode)

Tom Greene

Writer (1 episode)

Alan Caillou

Writer (1 episode)

David H. Balkan

Story (1 episode)