cast
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Lloyd Bridges
Mike Nelson
-
William Boyett
-
Leonard Nimoy
Tyler / Indio Ramirez / Johnny Brand /Johnny Bronson / Revolutionary Student (uncredited) / Liquid Explosives Thief (uncredited) / Hoya - Saboteur / Jerry Wiley / Vince
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Ross Elliott
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John Zaremba
- Ric Marlow
- Charles Maxwell USCG Lieutenant
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Lisa Gaye
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Anthony George
Jim Barry / Stan Graham
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Troy Melton
Charlie / Skin Diver / Pollywogs Leader (uncredited) / Miguel - Convict / Enemy Agent (uncredited)
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Tom Brown
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Russ Conway
Ed / USCG Lt. Cmdr. Barney Adams
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Noel Drayton
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Tyler McVey
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John Anderson
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Larry Hagman
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Robert Karnes
- King Moody
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Robert Clarke
Doug Trimble
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Sue Randall
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Peter Hansen
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Christopher Dark
Larry Brand /Larry Bronson
- Joe Dominguez Julio Salas / Arturo Ramirez / Juan
- Michael Masters Bill
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Jim Bannon
Police Chief Al Clark / Police Captain McMurdy / Fire Chief Jim McVey
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June Blair
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Mike Road
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John Lupton
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Kathie Browne
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John Marley
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Beau Bridges
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Terry Becker
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Whit Bissell
- John Lamb
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Myron Healey
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Paul Guilfoyle
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Paul Maxwell
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Robert Conrad
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William Bakewell
-
George Eldredge
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Ross Martin
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Dale Ishimoto
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Lane Bradford
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Gregory Gaye
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Jeff Bridges
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Aline Towne
- Don Oreck
- Harlan Warde
- John Beradino
-
Robert Ridgely
Cougar Norris / Conger Norris
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Harry Lauter
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Al Ruscio
General Cissario Sirrano
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Eric Feldary
Greg Andrews / Ben Tempesta
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Eugene Iglesias
Perez - Military Police / Diego
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Jack Hogan
Billy Riker / Ken Mason
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Quinn K. Redeker
Joey / USCG Lt. Bob Camp
- A.G. Vitanza Pier Manager / Merker
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Victor Buono
Dr. Tank Wallace / Seminard
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Robert F. Simon
Prof. Aaron Halliday / Dr.Tomaso Ricou
- Denise Alexander
-
Jack Nicholson
John Stark
- Dorothy Bridges
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Ricou Browning
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Frank Wolff
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Anthony Eustrel
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Brett Halsey
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Robert Quarry
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Grandon Rhodes
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Peter Breck
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Herbert Anderson
Professor George Bryan
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Gregg Palmer
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Morgan Brittany
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Oscar Beregi Jr.
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Byron Morrow
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Abraham Sofaer
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John Archer
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Bernard Kates
- Robert Gothie
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Joe De Santis
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Meg Wyllie
Mrs. Norris
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Robert Gist
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William Schallert
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Connie Hines
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Ralph Taeger
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Gertrude Michael
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Vitina Marcus
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Reed Hadley
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Anthony Caruso
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Joyce Meadows
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Irene Tedrow
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Kenneth Tobey
Pete Butler
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Bill Edwards
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Ted Knight
- Mark Dana
-
Ron Hayes
-
Ken Curtis
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Corey Allen
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Douglas Henderson
Dr. Barton
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Nestor Paiva
-
Jean Porter
-
Keith Andes
-
Leo Gordon
Panicky Miner
-
Phil Arnold
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Pamela Duncan
-
John Doucette
Louis Hale
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Gene Roth
-
Leonard Mudie
Eugene Laszlo
-
Anna Navarro
-
Peter Leeds
-
Bill Erwin
- Preston Hanson
-
Joi Lansing
-
Maris Wrixon
-
Willis Bouchey
- William Allyn
- Bernard Fein
- Sal Ponti Edward Palmer
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Dan White
-
John Qualen
-
Dehl Berti
-
Maurice Dallimore
-
Mari Blanchard
-
Jack Ging
Lou James
-
Paul Birch
- Paul Dixon
- Susan Silo Leliani
-
Larry Pennell
-
Walter Reed
Case Jarrett
-
Hank Patterson
-
Larry Thor
-
James Anderson
-
Chris Robinson
- Don Devlin
-
Julie Sommars
-
Anne Helm
- Ken Christy Mr. Palmer
-
John Bryant
- Kaye Elhardt
-
Bruce Dern
FBI Agent John Furillo
-
Nan Peterson
Norma Carter
-
Szabó Sándor
Bela Benedek
- Gerry Gaylor Lili Benedek
-
Morris Ankrum
-
Mike Steen
Sonny Kendall
- Bert Williams Bill Davies
-
Jana Lund
Jill Bromley
- Barry Harvey Ramone
-
Cyril Delevanti
Lars Anderson
- Hanna Landy Magna Androvich
-
Valerie Allen
Dana Perry
-
Mary Lawrence
Dr. Barnes
-
Keith Richards
Ed Romer
- Edson Stroll Julian Laubec
- Nick Dimitri George Turner
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Lomax Study
Dr. Barr
-
Michael Whalen
Oliver Brandon
-
Michael Granger
Norm 'Mr. Big' Brown
-
Patrick Waltz
-
Lisabeth Hush
Zoë White
-
Douglas Fowley
Pop
- Bill Catching Frank Brand /Frank Bronson
-
Nelson Olmsted
Marineland Aquarium Director
