A ship powered by a nuclear reactor, is heading for the port of New York and is unable to slow down.
| Actor | Role |
|---|---|
 Scott ForbesRoman | Roman |
 Frank PettingellCommodore Grant | Commodore Grant |
 Donald ChurchillMichael Holland | Michael Holland |
 Michael BalfourMr. Bollanger | Mr. Bollanger |
 Norman BowlerWainwright | Wainwright |
| MMadeleine BurgessMrs. Bollanger | Mrs. Bollanger |
 Michael CaineHelmsman | Helmsman |
 John CollinSullivan | Sullivan |
 Philip StoneSir Ronald Caterham | Sir Ronald Caterham |
| JJemma HydeAnn Shields | Ann Shields |