A madman hijacks the luxury cruise liner, S.S. Queen, and threatens to blow it up unless a millionaire pays him the the contents of a safe deposit box. The crew regains control of the ship, but the hijacker dies, taking the codes to disarm the bomb with him.
| Actor | Role |
|---|---|
 Robert StackCapt. James Morgan | Capt. James Morgan |
 David HedisonDr. Peter Brooks | Dr. Peter Brooks |
 Ralph BellamyJ.L. Dundeen | J.L. Dundeen |
 Bradford DillmanMartin Reed | Martin Reed |
 Sorrell BookeRobert Dwight | Robert Dwight |
 John RandolphJohn Howe | John Howe |
| LLinden ChilesMatthew Evans | Matthew Evans |
 Burr DeBenningTed Trevor | Ted Trevor |
 Sheila AllenClaudine Lennart | Claudine Lennart |
 Mills WatsonJim Greer | Jim Greer |
 Ellen WestonAnn Trevor | Ann Trevor |
 Francine YorkBetsy Shuster | Betsy Shuster |
 Paul CarrWalter Fletcher | Walter Fletcher |
 Elizabeth RogersIrene McKay | Irene McKay |
 Russell JohnsonForbes | Forbes |
| FFrank MarthPhillips | Phillips |
 Lara ParkerBarbara | Barbara |
 Vito ScottiBill Schuster | Bill Schuster |
 Richard X. SlatteryRiley | Riley |
 Than WyennFedderson | Fedderson |
 Patrick CullitonNot listed | Not listed |
 Steven MarloNot listed | Not listed |
 Erik L. NelsonJackson | Jackson |
 Gloria StuartFemale Passenger | Female Passenger |