AllMovie

This Edgar Wallace-based second feature headlines Bernard Lee, the beloved 5 of the James Bond pictures. Here Lee is a Scotland Yard inspector, baffled by a seemingly unrelated string of murders. The link between these homicides is the silver key of the title, which yields surprising results. It takes Lee very nearly the whole 59 minutes to unravel the mystery, thus Clue of the Silver Key is paced more like a serial episode than a standard British mystery. The film was the ninth in producer Jack Greenwood's 47-installment series of Edgar Wallace thrillers.