First broadcast 28th March 1994.

A nervous landlady brings a mysterious boarder to Holmes' attention, leading to a secret society and the efforts of a young couple to escape their past.

Jeremy Brett ... Sherlock Holmes
Edward Hardwicke ... Doctor Watson
Rosalie Williams ... Mrs Hudson
Betty Marsden ... Mrs Warren
Kenneth Connor ... Mr Warren
John Hallam ... Gorgiano
James Coombes ... Gennaro Lucca
Sophia Diaz ... Emilia Lucca
Tom Chadbon ... Inspector Hawkins
Kerry Shale ... Leverton
Joseph Long ... Firmani
Louise Heaney ... Vera