Evelyn Keyes as Sheila Bennet

Charles Korvin as Matt Krane

William Bishop as Dr. Ben Wood

Dorothy Malone as Alice Lorie

Lola Albright as Francie Bennet

Barry Kelley as Treasury Agent Johnson

Carl Benton Reid as Health Commissioner Ellis

Ludwig Donath as Dr. Cooper

Art Smith as Anthony Moss

Whit Bissell as Sid Bennet

Roy Roberts as Mayor of New York

Connie Gilchrist as Belle - the Landlady

Dan Riss as Skrip

Harry Shannon as Police Officer Houlihan

Jim Backus as Willie Dennis (uncredited)

Jay Barney as Angry Man in Tenement (uncredited)

George Baxter as Drug Company Executive (uncredited)

Eumenio Blanco as Passerby (uncredited)

John Bleifer as Walda's Uncle (uncredited)

Gail Bonney as Observer in Crowd (uncredited)

Chet Brandenburg as Observer on Street (uncredited)

Peter Brocco as Tom the Wino (uncredited)

Barry Brooks as Policeman (uncredited)

George Bruggeman as Vaccinated Man (uncredited)

Walter Burke as Danny - Bellhop (uncredited)

James Bush as Hennick (uncredited)

Dick Cherney as Radio Station Worker (uncredited)

Angela Clarke as Mrs. Dominic (uncredited)

Oliver Cross as Government Official (uncredited)

Jack Deery as Reporter (uncredited)

Paul Dubov as Intern, Phil (uncredited)

Richard Egan as Treasury Agent Owney (uncredited)

Edythe Elliott as Nurse (uncredited)

Roy Engel as Colonel (uncredited)

Charles Evans as General (uncredited)

George Ford as Federal Agent (uncredited)

Robert Foulk as Cop (uncredited)

Alex Gerry as Drug Company Executive (uncredited)

Everett Glass as Elderly Doctor (uncredited)

Billy Gray as Pinkie (uncredited)

Reed Hadley as Narrator (uncredited)

Alvin Hammer as Worried Man (uncredited)

Timmy Hawkins as Kid (uncredited)

Mary Alan Hokanson as Nurse Donna (uncredited)

Patricia Iannone as Girl (uncredited)

Teddy Infuhr as Boy Outside Willie's Place (uncredited)

Tommy Ivo as Jerry - Blond Boy (uncredited)

Eugene Jackson as Bootblack (uncredited)

Anthony Jochim as Observer in Crowd (uncredited)

Louise Kane as Teacher (uncredited)

Paul Keast as Drug Company Executive (uncredited)

Guy Kingsford as Manning (uncredited)

Don Kohler as Ted James (uncredited)

Ethan Laidlaw as Observer on Street (uncredited)

Norman Leavitt as The Photographer (uncredited)

King Lockwood as Reporter (uncredited)

Celia Lovsky as Mrs. Kowalski (uncredited)

Sydney Mason as Sober Man (uncredited)

Merrill McCormick as Man on Telephone (uncredited)

Russell Meeker as Reporter (uncredited)

Carl Milletaire as Cynic (uncredited)

Frances Morris as Housewife (uncredited)

Pat O'Malley as Police Sergeant (uncredited)

Gary Pagett as Baseball Kid (uncredited)

Paul Picerni as Health Department Investigator (uncredited)

James Pierce as Police Commissioner (uncredited)

Harry Raven as Man on Phone (uncredited)

Cosmo Sardo as Observer in Crowd (uncredited)

Warren Schannon as Kid (uncredited)

Lester Sharpe as Mr. Kowalski (uncredited)

Arthur Space as Dr. Penner (uncredited)

George Spaulding as Borum (uncredited)

Ray Spiker as Observer on Street (uncredited)

Peter Virgo as Joe Dominic (uncredited)

Ray Walker as Wise Guy (uncredited)

Helen Wallace as Mother Superior (uncredited)

Beverly Washburn as Walda Kowalski (uncredited)

Charles Watts as Charlie (uncredited)

Blackie Whiteford as Observer on Street (uncredited)

Gayne Whitman as Doctor (uncredited)

Chalky Williams as Radio Station Worker (uncredited)