Storyline: Seven rich men retire to a Scottish castle and promptly begin to die in violent fashion. Each death is preceded by the delivery of orange pips to the next target. As all the likely victims are heaviliy insured, Sherlock Holmes is asked by the insurance companies to investigate.

Storyline: In World War II, a British secret agent carrying a vitally important document is kidnapped en route to Washington. The British government calls on Sherlock Holmes to recover it.

Storyline: England, at the start of World War Two. Mysterious wireless broadcasts, apparently from Nazi Germany are heard over the BBC. The warn of acts of terror in England, just before they take place. Baffled, the Defence Committee call in Holmes ...

Storyline: Professor Moriarity has a scheme for stealing the crown jewels from the Tower of London. To get Holmes involved, he persuades a gaucho flute player to murder a girl.

Storyline: On his uncle's death Sir Henry Baskerville returns from abroad and opens up the ancestral hall on the desolate moors of Devonshire. Holmes uncovers a plot to have Sir Henry murdered by a terrible trained hound. First casting of Rathbone and Bruce as Holmes and Watson.