- 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
- Tiger Williams - Corry
- Donald Moffat - Dr. Harvey Johnson
- Jesse Vint - Buck
- Alan Vint - Ralph
- Lionel Johnston - Hank
- John Elerick - Carl Leeds
- John S. Ragin - Chief Inspector
- George Murdock - Colonel
- Don Mantooth - Sid
- Michael Richardson - Sandy
- Alex Brown - Pool Player
- Bob Cunningham - Dr. Frank Ames
- John Dennis - Brawny Foreman
- Gene Dynarski - Dam Caretaker
- H.B. Haggerty - Pool Player
- Tim Herbert - Las Vegas Man
- Dave Morick - Technician
- Ines Pedroza - Laura
- Josh Albee - Boy with Radio (uncredited)
- Don Ames - Citizen (uncredited)
- Benjie Bancroft - Citizen (uncredited)
- Buzz Barbee - Restaurant Patron (uncredited)
- Joan Blair - Pawnbroker's Wife (TV version) (uncredited)
- Hal Bokar - Dam Workman (uncredited)
- Reb Brown - Young Man on Motorcycle (uncredited)
- Vivian Brown - Woman (uncredited)
- Ian Bruce - Officer Scott (Wilson Plaza) (uncredited)
- Polly Burson - Earthquake Survivor (uncredited)
- William H. Burton Jr. - Stranger (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)
- Shannon Christie - Dr. Vance's Nurse (uncredited)
- Erik Cord - Office Worker (uncredited)
- Ken DuMain - Earthquake Survivor in Wilson Plaza (uncredited)
- Brent Dunsford - Man Drinking from Plastic Cup in Wilson Plaza (uncredited)
- Patty Elder - Blonde Secretary in Royce Building (uncredited)
- Kenny Endoso - Bar Cook (uncredited)
- Jeannie Epper - Blonde Woman (uncredited)
- Bobby Ferro - Sports Car Thief (uncredited)
- Bruce M. Fischer - Man (uncredited)
- Sig Frohlich - Doctor (uncredited)
- James W. Gavin - Helicopter Pilot (uncredited)
- Ernest Harada - Seismologist (uncredited)
- Jerry Hardin - Man (uncredited)
- Bob Harks - Man Fleeing Movie Theatre (uncredited)
- Orwin C. Harvey - Man on the Balcony of a Falling House (uncredited)
- Lars Hensen - Citizen (uncredited)
- Diana Herbert - Woman (uncredited)
- Bert Kramer - Policeman (uncredited)
- Paul LeClair - National Guardsman (uncredited)
- Karl Lukas - Man (uncredited)
- Ernesto Molinari - Citizen (uncredited)
- Stevie Myers - Earthquake Victim (uncredited)
- Jimmy Nickerson - Seismology Graduate Student (uncredited)
- Stuart Nisbet - Man on Loudspeaker (voice) (uncredited)
- Frances Osborne - Housewife (uncredited)
- Grant Owens - Police Officer (uncredited)
- Charlie Picerni - Pool Player (uncredited)
- Tony Regan - Man Fleeing Movie Theatre (uncredited)
- Leoda Richards - Emergency Soup Kitchen Worker in Wilson Plaza (uncredited)
- Clark Ross - Man in Outer Office (uncredited)
- George Sawaya - Deputy Sherriff (uncredited)
- Mark Sawtelle - Boy (uncredited)
- Fred Scheiwiller - Jay the Bartender (uncredited)
- Debralee Scott - Kathie (TV version) (uncredited)
- Dean Smith - Pool Player (uncredited)
- Eddie Smith - Citizen (uncredited)
- Norman Stevans - Radio Station Technician (uncredited)
- Arthur Tovey - Citizen (uncredited)
- John Tuell - Prop Tractor Driver (uncredited)
- Dick Tufeld - Opening Narrator (uncredited)
- Kitty Vallacher - Grocery Store Clerk (uncredited)
- Keith Walker - Man on the Radio (voice) (uncredited)
- Sandy Ward - Studio Guard (uncredited)
- Rick Warick - Office Worker (uncredited)
- Dick Warlock - Diver at Hollywood Reservoir (uncredited)
- William Whitaker - Ambulance Driver (uncredited)
- Don Wilbanks - Dam Workman with Blowtorch (uncredited)
- Forrest Wood - Man (uncredited)
- Clint Young - Dam Workman (uncredited)
-
Mark Robson
- Mario Puzo
- George Fox
- Jennings Lang
- John Williams
- Ronald Pierce
Charlton Heston interpreta a Stewart Graff en la película.
Ava Gardner hace el papel de Remy Royce-Graff.
George Kennedy interpreta a Sgt. Lew Slade en la película.
Lorne Greene hace el papel de Sam Royce.
Geneviève Bujold interpreta a Denise Marshall en la película.
Richard Roundtree hace el papel de Miles Quade.
Marjoe Gortner hace el papel de Jody.
Barry Sullivan interpreta a Dr. Willis Stockle en la película.
Lloyd Nolan interpreta a Dr. James Vance en la película.
Victoria Principal interpreta a Rosa Amici en la película.
Walter Matthau hace el papel de Drunk.
Monica Lewis interpreta a Barbara en la película.
Gabriel Dell interpreta a Sal en la película.
Pedro Armendáriz Jr. interpreta a Chavez en la película.
Lloyd Gough interpreta a Bill Cameron en la película.
John Randolph interpreta a Los Angeles Mayor en la película.
Kip Niven interpreta a Walter Russell en la película.
Scott Hylands hace el papel de Asst. Caretaker.
Tiger Williams interpreta a Corry en la película.
Donald Moffat interpreta a Dr. Harvey Johnson en la película.
Jesse Vint interpreta a Buck en la película.
Alan Vint hace el papel de Ralph.
Lionel Johnston interpreta a Hank en la película.
John Elerick interpreta a Carl Leeds en la película.
John S. Ragin interpreta a Chief Inspector en la película.
George Murdock interpreta a Colonel en la película.
Don Mantooth interpreta a Sid en la película.
Michael Richardson interpreta a Sandy en la película.
Alex Brown hace el papel de Pool Player.
Bob Cunningham interpreta a Dr. Frank Ames en la película.
John Dennis interpreta a Brawny Foreman en la película.
Gene Dynarski hace el papel de Dam Caretaker.
H.B. Haggerty hace el papel de Pool Player.
Tim Herbert hace el papel de Las Vegas Man.
Dave Morick hace el papel de Technician.
Ines Pedroza hace el papel de Laura.
Josh Albee interpreta a Boy with Radio (uncredited) en la película.
Don Ames interpreta a Citizen (uncredited) en la película.
Benjie Bancroft hace el papel de Citizen (uncredited).
Buzz Barbee hace el papel de Restaurant Patron (uncredited).
Joan Blair interpreta a Pawnbroker's Wife (TV version) (uncredited) en la película.
Hal Bokar interpreta a Dam Workman (uncredited) en la película.
Reb Brown hace el papel de Young Man on Motorcycle (uncredited).
Vivian Brown interpreta a Woman (uncredited) en la película.
Ian Bruce interpreta a Officer Scott (Wilson Plaza) (uncredited) en la película.
Polly Burson interpreta a Earthquake Survivor (uncredited) en la película.
William H. Burton Jr. interpreta a Stranger (uncredited) en la película.
Ric Carrott hace el papel de National Guardsman (uncredited).
David S. Cass Sr. hace el papel de Sherriff Merle (uncredited).
Lonny Chapman interpreta a LAPD Captain (uncredited) en la película.
Sam Chew Jr. hace el papel de Tony (Kathie's Husband) (uncredited).
Shannon Christie interpreta a Dr. Vance's Nurse (uncredited) en la película.
Erik Cord interpreta a Office Worker (uncredited) en la película.
Ken DuMain hace el papel de Earthquake Survivor in Wilson Plaza (uncredited).
Brent Dunsford hace el papel de Man Drinking from Plastic Cup in Wilson Plaza (uncredited).
Patty Elder interpreta a Blonde Secretary in Royce Building (uncredited) en la película.
Kenny Endoso interpreta a Bar Cook (uncredited) en la película.
Jeannie Epper hace el papel de Blonde Woman (uncredited).
Bobby Ferro interpreta a Sports Car Thief (uncredited) en la película.
Bruce M. Fischer interpreta a Man (uncredited) en la película.
Sig Frohlich hace el papel de Doctor (uncredited).
James W. Gavin interpreta a Helicopter Pilot (uncredited) en la película.
Ernest Harada interpreta a Seismologist (uncredited) en la película.
Jerry Hardin interpreta a Man (uncredited) en la película.
Bob Harks interpreta a Man Fleeing Movie Theatre (uncredited) en la película.
Orwin C. Harvey interpreta a Man on the Balcony of a Falling House (uncredited) en la película.
Lars Hensen interpreta a Citizen (uncredited) en la película.
Diana Herbert interpreta a Woman (uncredited) en la película.
Bert Kramer interpreta a Policeman (uncredited) en la película.
Paul LeClair interpreta a National Guardsman (uncredited) en la película.
Karl Lukas interpreta a Man (uncredited) en la película.
Ernesto Molinari interpreta a Citizen (uncredited) en la película.
Stevie Myers interpreta a Earthquake Victim (uncredited) en la película.
Jimmy Nickerson interpreta a Seismology Graduate Student (uncredited) en la película.
Stuart Nisbet hace el papel de Man on Loudspeaker (voice) (uncredited).
Frances Osborne interpreta a Housewife (uncredited) en la película.
Grant Owens interpreta a Police Officer (uncredited) en la película.
Charlie Picerni interpreta a Pool Player (uncredited) en la película.
Tony Regan interpreta a Man Fleeing Movie Theatre (uncredited) en la película.
Leoda Richards interpreta a Emergency Soup Kitchen Worker in Wilson Plaza (uncredited) en la película.
Clark Ross interpreta a Man in Outer Office (uncredited) en la película.
George Sawaya hace el papel de Deputy Sherriff (uncredited).
Mark Sawtelle interpreta a Boy (uncredited) en la película.
Fred Scheiwiller hace el papel de Jay the Bartender (uncredited).
Debralee Scott hace el papel de Kathie (TV version) (uncredited).
Dean Smith interpreta a Pool Player (uncredited) en la película.
Eddie Smith hace el papel de Citizen (uncredited).
Norman Stevans hace el papel de Radio Station Technician (uncredited).
Arthur Tovey hace el papel de Citizen (uncredited).
John Tuell interpreta a Prop Tractor Driver (uncredited) en la película.
Dick Tufeld interpreta a Opening Narrator (uncredited) en la película.
Kitty Vallacher hace el papel de Grocery Store Clerk (uncredited).
Keith Walker interpreta a Man on the Radio (voice) (uncredited) en la película.
Sandy Ward hace el papel de Studio Guard (uncredited).
Rick Warick interpreta a Office Worker (uncredited) en la película.
Dick Warlock interpreta a Diver at Hollywood Reservoir (uncredited) en la película.
William Whitaker hace el papel de Ambulance Driver (uncredited).
Don Wilbanks hace el papel de Dam Workman with Blowtorch (uncredited).
Forrest Wood interpreta a Man (uncredited) en la película.
Clint Young interpreta a Dam Workman (uncredited) en la película.
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