Humphrey Neyland is seeking to discover who is leaking sensitive information to the enemy. And having made contact with his opposite number in Special Branch, they agree to meet later that night at the man's digs, to compare notes.

Anton Lesser reads JB Priestley's atmospheric war-time thriller, set in a Midlands town during the blackout.

Abridged and produced by Jane Marshall
A Jane Marshall production for BBC Radio 4. Show less