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