The Whispering Shadow

... and directors Albert Herman and Colbert Clark. Two-fisted shipping company foreman Jack Foster (Malcolm McGregor) is determined to avenge the murder of his brother, a delivery driver for the same company who was killed by agents of the Whispering Shadow, a mysterious figure leading a criminal gang who keep attacking deliveries made by the company. Company president Bradley (Henry B. Walthall) also enlists the aid of noted detective Robert Raymond (Robert Warwick) to assist Jack in his efforts. All signs point to the culprit being a creepy magician named Professor Strang (Bela Lugosi) who operates a wax museum out of his House of Mystery. Also featuring Viva Tattersall as Strang's lovely daughter and accomplice, Karl Dane as a goofy comic-relief radio operator, Roy D'Arcy and Lafe McKee as shady company employees, Ethel Clayton, Lloyd Whitlock, Bob Kortman, and Yakima Canutt.

The outlandish plot, wide variety of interesting characters, and incredible stunts all combine to make this a stand-out in the serial genre. It's still pretty dumb, and goes on longer than the story can sustain it, but it's silly fun. Lugosi, appearing in the first of several serials he would make, hams it up quite a bit, but seems to be enjoying himself. Dane, who struggled with his thick accent in sound pictures, makes his final film appearance.