Charlton Heston
Stewart Graff
Ava Gardner
Remy Royce-Graff
George Kennedy
Sgt. Lew Slade
Lorne Greene
Sam Royce
Geneviève Bujold
Denise Marshall
Richard Roundtree
Miles Quade
Marjoe Gortner
Jody
Barry Sullivan
Dr. Willis Stockle
Lloyd Nolan
Dr. James Vance
Victoria Principal
Rosa Amici
Walter Matthau
Drunk
Monica Lewis
Barbara
Gabriel Dell
Sal
Pedro Armendáriz Jr.
Chavez
Lloyd Gough
Bill Cameron
John Randolph
Los Angeles Mayor
Kip Niven
Walter Russell
Scott Hylands
Asst. Caretaker
Donald Moffat
Dr. Harvey Johnson
Jesse Vint
Buck
Alan Vint
Ralph
John Elerick
Carl Leeds
John S. Ragin
Chief Inspector
George Murdock
Colonel
John Dennis
Brawny Foreman
Gene Dynarski
Dam Caretaker
H.B. Haggerty
Pool Player
Tim Herbert
Las Vegas Man
Josh Albee
Boy with Radio (uncredited)
Joan Blair
Pawnbroker's Wife (TV version) (uncredited)
Reb Brown
Young Man on Motorcycle (uncredited)
Polly Burson
Earthquake Survivor (uncredited)
Ric Carrott
National Guardsman (uncredited)
David S. Cass Sr.
Sherriff Merle (uncredited)
Lonny Chapman
LAPD Captain (uncredited)
Sam Chew Jr.
Tony (Kathie's Husband) (uncredited)
Erik Cord
Office Worker (uncredited)
Kenny Endoso
Bar Cook (uncredited)
Jeannie Epper
Blonde Woman (uncredited)
Bruce M. Fischer
Man (uncredited)
Ernest Harada
Seismologist (uncredited)
Jerry Hardin
Man (uncredited)
Bob Harks
Man Fleeing Movie Theatre (uncredited)
Diana Herbert
Woman (uncredited)
Bert Kramer
Policeman (uncredited)
Paul LeClair
National Guardsman (uncredited)
Karl Lukas
Man (uncredited)
Jimmy Nickerson
Seismology Graduate Student (uncredited)
Stuart Nisbet
Man on Loudspeaker (voice) (uncredited)
Frances Osborne
Housewife (uncredited)
Charlie Picerni
Pool Player (uncredited)
Debralee Scott
Kathie (TV version) (uncredited)
Dean Smith
Pool Player (uncredited)
Eddie Smith
Citizen (uncredited)
Arthur Tovey
Citizen (uncredited)
Keith Walker
Man on the Radio (voice) (uncredited)
Sandy Ward
Studio Guard (uncredited)
Dick Warlock
Diver at Hollywood Reservoir (uncredited)
