Directed by:
- Robert Wise
Written by:
- Dana Lyon ... (novel)
- Elick Moll ... (screenplay)
- Frank Partos ... (screenplay)
- Robert Bassler
- Richard Murphy
- Robert Wise
Main cast:
- Richard Basehart ... Alan Spender
- Valentina Cortese ... Victoria Kowelska
- William Lundigan ... Major Marc Bennett
- Fay Baker ... Margaret
- Gordon Gebert ... Christopher
- Steven Geray ... Dr. Burkhardt
- Herbert Butterfield ... Joseph C. Callahan
- Kei Thin Chung ... Kei, the Houseboy
- John Burton ... Mr. Whitmore
- Katherine Meskill ... Mrs. Whitmore
- Mario Siletti ... Tony, the Grocer
- Charles Wagenheim ... Man at Accident
- David Clarke ... Mechanic
- Tamara Schee ... Maria
- Natasha Lytess ... Karin Dernakova
- Ashmead Scott ... Inspector Hardy
- Mari Young ... Chinese Singer
- Tom McDonough ... Farrell
.