An instructional film released by the UK Warning and Monitoring Organization which depicts its operations in the lead-up to and aftermath of a hypothetical nuclear attack on the United Kingdom.
Cast

John Welsh
Sector Controller
Tony Thawnton
Chief Meteorological Officer

Edward Underdown
Duty Controller

Valerie Van Ost
Nurse
Michael Smee
Post Chief Observer
Larry Martyn
Post Observer

Guy Standeven
Post Observer
Ian Patterson
Doctor
Richard Butler
ROC Sector Officer
John Graham
Chief Scientist
Brian Forster
Chief Warning Officer
Michael McStay
French Liaison Officer
Jill Cary
Post Observer