Watch Mari-Cookie and the Killer Tarantula for Free: How to Stream the Movie Online at 123Movies. . Down at the docks a very enterprising but dangerous element is making life miserable for Sheriff Marga. But she is distracted by a series of puzzling kidnappings that is plaguing her parish. Could the culprit be the mysterious Queen - the dance hall queen of the docks? Or could it be an even more sinister figure: The Killer Tarantula?