Scotland Yard must discover why people are being murdered by a monstrous dog at Blackwood Castle.
as Humphrey Connery
as Jane Wilson
as Douglas Fairbanks
as Sir John
as Lady Agathy Beverton
as Miss Finley
as Catharina Wilson
as Dorothy Cornick
as Anwalt Robert Jackson
as Kapitän Wilson
as Doc Adams
as Lord Beverton
as Ken Nelson
as Edward Baldwin
as Grimsby
as Tom Heynes
as Edgar Wallace ( Voice )
