"The Red Circle"

From the Series: The Memoirs of Sherlock Holmes

Jeremy Brett as Sherlock Holmes, Edward Hardwicke as Dr Watson (6 episodes 1994)
First published in "The Strand Magazine" Mar/Apr 1911 (REDC)

Synopsis:
The behaviour of a secretive lodger and the murder of a previous client set holmes on the case.

Review:
A good episode if it wasnt for some blatant plot holes and some appalling lack of protection for those in danger.