Having safely snaffled the blood-steeped “Borgia Pearl” from the dastardly clutches of “Giles Conover” (Miles Mander) “Holmes” (Basil Rathbone) is hoist by his own petard when his rather pompous illustration to the museum curator of the flaws of electronic security systems only sees it stolen again! This time, he and “Watson” (Nigel Bruce) have to try to track it down whilst the smug “Lestrade” (Dennis Hoey) has a laugh at their expense. They really haven’t much clue, until a man is murdered in a particularly violent fashion and his body found amidst some smashed china. Then another, then anoth...