Matter-transmitter sabotage leaves a British scientist (Bryant Halliday) disfigured and full of amps.

Sherlock Holmes (Jeremy Brett) devises a cunning plan to snare a ruthless blackmailer who’s been causing misery throughout London. And this time, even his loyal sidekick Dr. Watson finds the Baker Street sleuth’s campaign a little strange. Based on Arthur Conan Doyle’s characters, this film features a softened version of Holmes who — zounds! — falls in love.