Sherlock Holmes had noticed something about dogs and the way they behave and how this could help in detective work. For example who ever saw a frisky dog in a gloomy family or a sad dog in a happy one. Snarling people have snarling dogs and dangerous people have dangerous dogs. What now interests Holmes is why Professor Presbury’s faithful wolfhound Roy, endeavours to bite him. The dog until recently most devoted animal had attacked his master twice but had attacked no one else. . . 
Duration: 30:56 
Starring: Tom Conway, Nigel Bruce 
Broadcast Date: 17th March 1947