With the help of government-issued pamphlets, an elderly British couple build a shelter and prepare for an impending nuclear attack, unaware that times and the nature of war have changed from their romantic memories of World War II.
| Actor | Role |
|---|---|
 John MillsJim Bloggs (voice) | Jim Bloggs (voice) |
 Peggy AshcroftHilda Bloggs (voice) | Hilda Bloggs (voice) |
 Robin HoustonRadio Announcer (voice) | Radio Announcer (voice) |
| JJames RussellRussian submariner (voice) | Russian submariner (voice) |
 David DundasAdditional Voices (voice) | Additional Voices (voice) |
| MMatt IrvingAdditional Voices (voice) | Additional Voices (voice) |
 Bernard MontgomerySelf (archive footage) | Self (archive footage) |
 Harry S. TrumanSelf (archive footage) | Self (archive footage) |
 Joseph StalinSelf (archive footage) | Self (archive footage) |
 Winston ChurchillSelf (archive footage) | Self (archive footage) |