Level 7 is a
1959 science fiction novel by
Mordecai Roshwald[?]. It describes the experiences of a man who is ordered to pull the trigger in
World War III, and his remaining
life and
death as the radioactive
fallout from above eats its way slowly down into his underground radiation shelter, level by level.
Level 7 was adapted by J. B. Priestly for a 1966 episode of the BBC2 television science-fiction drama programme Out of the Unknown.