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The Mystery Squadron (1933)

Passed  -  Action | Adventure  -  22 December 1933 (USA)
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Ratings: 6.5/10 from 44 users  
Reviews: 6 user | 1 critic

Hank Davis, foreman on a huge dam project, enlists the aid of his two flyer friends when a sinister figure known as The Black Ace leads his Mystery Squadron of masked pilots in an attempt to destroy the dam.


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Complete credited cast:
Guinn 'Big Boy' Williams ...
Bill 'Jellybean' Cook (as 'Big Boy' Williams)
Lucile Browne ...
Jack Mulhall ...
Purnell Pratt ...
Lafe Johnson
Robert Frazer ...
Dr. Flint
J. Carrol Naish ...
Bob Kortman ...
Lafe McKee ...
Stephen Gray
Edward Hearn ...
Sheriff [Chs. 2-3, 12]
Kernan Cripps ...
Tom - Dam Foreman
Edward Peil Sr. ...
Andrew Martin (as Edward Peil)
Jack Mower ...
Henchman Carter
Jack Perrin ...
Roberts (a Mystery Flyer)


Chapter 1, "The Black Ace" opens with dam-project foreman Hank Davis hiring two stunt flyers he once flew with, Fred Cromell and Bill "Jellybean" Cook, to protect the dam from the air raids by a group known as the Mystery Squadron, under the leadership of the mysterious Black Ace. Each attack is preceded by the arrival of a miniature airplane carrying a warning that the Mystery Squadron is about to attack. This makes the workers somewhat disturbed and distressed to the point that they mistake Fred and Bill for members of the criminal air armada. The workers form a vigilante lynch mob from which Fred and Bill must escape and continue their 12-chapter search to unmask The Black Ace. Those in a hurry can flash-forward to the ending of chapters 4-6-8 and 12, as they are all "cheater chapters" comprised primarily of various players recapping, via flashback footage, what has transpired in preceding chapters.Mascot and Republic led the serial world in the use of cheater chapters, but they ... Written by Les Adams <>

Plot Summary | Add Synopsis


Action | Adventure






Release Date:

22 December 1933 (USA)  »

Also Known As:

A Esquadrilha Misteriosa  »

Company Credits

Production Co:

Show detailed on  »

Technical Specs


(12 chapters)

Sound Mix:

Aspect Ratio:

1.37 : 1
See  »

Did You Know?


When Mystery Squadron bad guy Roberts is shot dead while shooting a flame-thrower from his plane, he falls halfway out of the cockpit and hangs there motionless. Despite the fact that apparently no one is piloting the craft, it manages to make a perfect three-point landing and come to a halt all by itself. See more »

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User Reviews

One of the best Mascot Serials.
3 February 2003 | by (Ky.) – See all my reviews

Like all Mascot serials, "Mystery Squadron," was made on a slight budget. But this didn't keep it from being a fun watch. The serial was loaded with good stunt action, and those of you with a bit of interest in vintage airplanes,(circa 1920's) plenty of good aerial action, and fine stunt flying. Of course, in most Mascot serials there was a masked villain, The Black Ace, who's identity would only be revealed in the finial chapter. If you enjoy movie serials, give it a try. One of the best Mascot serials.

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