理查德·邓宁

Richard Denning

饰：Dr. Chet Walker

安吉拉·史蒂文斯

Angela Stevens

饰：Joyce Walker

S·约翰·劳纳

S. John Launer

饰：Capt. Dave Harris

迈克尔·格兰杰

Michael Granger

饰：Frank Buchanan

格雷戈里·盖伊

Gregory Gaye

饰：Dr. Wilhelm Steigg (as Gregory Gay)

Linda Bennett

饰：Penny Walker

特利斯特拉姆·科芬

Tristram Coffin

饰：Dist. Atty. MacGraw

哈里·劳特

Harry Lauter

饰：Reporter #1

拉里·J·布莱克

Larry J. Blake

饰：Reporter #2 (as Larry Blake)

Charles Evans

Charles Evans

饰：Chief Camden

皮埃尔·沃特金斯

Pierre Watkin

饰：Mayor Bremer

Paul Hoffman

Paul Hoffman

饰：Tom Dunn

莱恩·钱德勒

Lane Chandler

饰：Gen. Saunders (uncredited)

Edward Coch

Edward Coch

饰：Jason Franchot (uncredited)

Richard H. Cutting Richard H. Cutting

饰：(uncredited)

卡尔“杀手”戴维斯

Karl 'Killer' Davis

饰：Willard Pearce (first creature) (uncredited)

唐·C·哈维

Don C. Harvey

饰：Lester Banning (uncredited)

查尔斯·霍尔发斯

Charles Horvath

饰：Creature (uncredited)

Nelson Leigh

饰：Dr. Kenneth Norton (uncredited)

泰勒麦克维

Tyler McVey

饰：Police officer (uncredited)

迈克尔·罗斯

Michael Ross

迪克·克罗基特

Dick Crockett

Eddie Foster

特里·弗罗斯特

Terry Frost