理查德·德尔
Richard Derr
饰：David Randall
芭芭拉·拉什
Barbara Rush
饰：Joyce Hendron
彼得·汉森
Peter Hansen
饰：Dr. Tony Drake M.D.
约翰·霍伊特
John Hoyt
饰：Sydney Stanton (millionaire)
Larry Keating
饰：Dr. Cole Hendron, Astronomer at Cosmos Observatory
瑞秋埃姆斯
Rachel Ames
饰：Julie Cummings (as Judith Ames)
Alden 'Stephen' Chase
Stephen Chase
饰：Dr. George Frye, Dean of Eastern School of Technology (as Stephe
弗兰克·卡迪
Frank Cady
饰：Harold Ferris, Stanton's Assistant
海登·罗克
Hayden Rorke
饰：Dr. Emery Bronson
Sandro Giglio
饰：Dr. Ottinger, Astronomer
柯克·阿林
Kirk Alyn
饰：Rioter Bringing Guns (uncredited)
格特鲁德·阿斯特
Gertrude Astor
饰：Traveler (uncredited)
Robert Chapman
Robert Chapman
饰：Student (uncredited)
Gene Collins
饰：Newsdealer (uncredited)
James Congdon
James Congdon
饰：Eddie Garson (uncredited)
Marcel De la Brosse
饰：Headwaiter (uncredited)
Estelle Etterre
饰：Traveler (uncredited)
Sam Finn
饰：Complaining Man at Airport (uncredited)
保罗·费斯
Paul Frees
饰：Narrator,U.S. President (uncredited)
阿特·吉尔摩
Art Gilmore
饰：Paul, Dr. Bronson's Assistant (uncredited)
夏密安·哈克
Charmienne Harker
饰：Student (uncredited)
拉姆齐·希尔
Ramsay Hill
饰：French U.N. Respresentative (uncredited)
沃尔特·凯利
Walter Kelley
饰：Student (uncredited)
Hassan Khayam
Hassan Khayam
饰：Indian U.N. Chairman (uncredited)
Rudy Lee
饰：Mike, Little boy with dog (uncredited)
Freeman Lusk
饰：Rudolph Marsden, Businessman (uncredited)
Chad Madison
Chad Madison
饰：Student (uncredited)
Dolores Mann
Dolores Mann
饰：Student (uncredited)
William Meader
饰：Jerry, the Clerk (uncredited)
约瑟夫·梅尔
Joseph Mell
饰：Glen Spiro, Astronomer (uncredited)
伦纳德米迪
Leonard Mudie
饰：British U.N. Representative (uncredited)
Gay Nelson
Gay Nelson
饰：Leda (uncredited)
凯斯·理查德
Keith Richards
饰：Stanley (Dr. Bronson's assistant) (uncredited)
约翰·里德格利
John Ridgely
饰：Chief Customs Inspector (uncredited)
李奥纳多·凯瑞
Leonard Carey
饰：Stewardess (uncredited)
Frances Sandford
饰：Alice, Hendron's receptionist (uncredited)
杰弗里·塞尔
Jeffrey Sayre
饰：Taxi Driver (uncredited)
James Seay
饰：Donovan, New York Sentinel Reporter (uncredited)
奎妮·史密斯
Queenie Smith
饰：Matron with Cigarette (uncredited)
Harry Stanton
饰：Dr. Zenta, Astronomer (uncredited)
Robert Sully
饰：Student (uncredited)
Richard Vath
Richard Vath
饰：Student (uncredited)
斯图尔特·惠特曼
Stuart Whitman
饰：Extra by bunk during riot instigation (uncredited)
玛丽亚·弗劳
Maria Frau
饰：Bianca Spada
弗朗索瓦丝·罗赛
Françoise Rosay
饰：Dama di Sant'Agata
吉赛拉·索菲约
Gisella Sofio
饰：Barberina
Angiola Faranda
Angiola Faranda
饰：Gemma Spada,(as Angiola Maria Faranda)
Bianca Maria Fabbri
Bianca Maria Fabbri
Paolo Rocca
Maria Colonna
弗兰克·拉铁摩尔
Frank Latimore
饰：Capitan Vessillo
爱德华多·钱内利
Eduardo Ciannelli
饰：Inquisitore,(as Edward Cianelli)
Carlo Micheluzzi
饰：Il Doge
Lauro Gazzolo
饰：Il banchiere
Armando Guarnieri
饰：Messer Grande,(as Armando Guarneri)
Patricia Deren
马西莫·吉洛蒂
Massimo Girotti
饰：Capitan Marco Spada