Murders of nuclear scientists in London baffle Scotland Yard, while a US State Department officer oversees the transfer of a Russian scientist fleeing the USSR. A reporter covers the story, and the scientist is moved to a secret location after an attempted assassination. The officer discovers the gang's hideout, but is captured and tortured, only to escape and prevent the scientist's murder by a midget and a monkey.
The Case of the Red Monkey
A wave of gruesome murders of nuclear experts in London leaves Scotland Yard stumped, as the arrival of a US State Department official, Bill Locklin, coincides with the transfer of Professor Leon.