By Israel Zangwill, dramatised by Robert Messik.
1892: A man is found dead in a locked room.
The windows and door are locked and bolted from the inside, the only way into the room is a chimney into which even a small child couldn't squeeze.
But it's not suicide.
A seemingly inexplicable murder brings London to a standstill and pits the city's two greatest detectives against each other.
Inspector Grodman....John Woodvine
Inspector Wimp....David Holt
Mrs Drabdump....Carolyn Pickles
Producer/Director David Ian Neville.