A British lieutenant faces perilous missions to disarm German bombs with deadly timers, risking his life during the early stages of World War II.

In the next episode, a newly-promoted Second Lieutenant named Brian Ash finds...
The Royal Engineer Tunnelling Company 97 is reformed as a bomb disposal unit, facing the treacherous challenge of neutralizing thousands of undetonated bombs in London amidst the chaos of the Battle of Britain.
A British lieutenant faces perilous missions to disarm German bombs with deadly timers, risking his life during the early stages of World War II.