U.S. spies catch a Moscow-born U.S. citizen helping spies, and they force him to counterspy.
| Actor | Role |
|---|---|
 Ernest BorgnineBoris Mitrov | Boris Mitrov |
 Kerwin MathewsBob Avery | Bob Avery |
 Colleen DewhurstHelen Benson | Helen Benson |
 Alexander ScourbyColonel Vadja Kubelov | Colonel Vadja Kubelov |
 Glenn CorbettFrank Sanford | Frank Sanford |
| HHanna LandyBess Harris | Bess Harris |
 Vladimir SokoloffPapa of Boris Mitrov | Papa of Boris Mitrov |
 Friedrich JoloffGen. Nikolai Chapayev | Gen. Nikolai Chapayev |
 Holger HagenHans Grünwald | Hans Grünwald |
| RReginald PaschOtto Bergman | Otto Bergman |
 Eva PflugTanja Rosnova | Tanja Rosnova |
| RRichard KendrickInspector Jenkins | Inspector Jenkins |
| EEd PrentissNot listed | Not listed |
| BBob IllerNot listed | Not listed |
 Carl JaffeNot listed | Not listed |
 Michael MellingerNot listed | Not listed |
| CClete RobertsNarrator (voice) | Narrator (voice) |
 Seymour CasselNot listed | Not listed |
 James T. CallahanNot listed | Not listed |
 Lisa GolmNot listed | Not listed |
 Ted KnightNot listed | Not listed |
 Eve McVeaghNot listed | Not listed |