| Complete credited cast: | |||
| Noah Beery | ... | ||
| Astrid Allwyn | ... | ||
| Edwin Maxwell | ... | ||
| Gustav von Seyffertitz | ... |
Inspector Von Kessling
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| Ralph Lewis | ... |
Prof. Grimson
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Cornelius Keefe | ... |
First Officer Cliff Rogers
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| Zeffie Tilbury | ... |
Granny Plimpton
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Boothe Howard | ... |
Capt. Downey
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| Howard C. Hickman | ... |
Dr. Howard
(as Howard Hickman)
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Jerry Stewart | ... |
Edgar Morton
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| George 'Gabby' Hayes | ... |
Joe, the watchman
(as George Hayes)
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| George Cleveland | ... |
Simms the Steward
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John M. Sullivan | ... |
Watson
(as John Maurice Sullivan)
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Captain Holling is relieved of command of his ship after he suffers a nervous breakdown. His replacement, Captain Downey, takes over the liner just as it is about to be used for an experiment in remote control. Professor Grimson has devised a system for controlling the ship from a laboratory on land. But as Grimson demonstrates the system and the special component that makes it work, a rival group is listening in, hoping to use the device for its own purposes. Shortly after the demonstration, the professor is attacked and fatally injured. Major Pope comes on board to investigate the attack, and he decides to come along on the planned trip. Soon the ship is full of passengers and crew--and at least two of the ship's occupants are really enemy agents. Written by Snow Leopard
Mystery Liner has to be one of the very few times that the senior Noah Beery ever headed a cast list. He had to go to Monogram Pictures to have this happen and the results are somewhat indifferent.
Edgar Wallace novels are usually sources of material for film, but in this case they didn't really get down to business until the final third of the film. Someone has invented a remote control steering device for ships and so while this is peacetime, it's decided to test it on a passenger liner. But a mysterious foreign power wants to get this device and the plan is to cut in with their own radio waves and steal the ship. They've fatally injured the inventor Ralph Lewis and a few more people will die before all is revealed.
Beery plays the ship's captain who is stripped of command due to a nervous breakdown and forced into a rest home. But he doesn't show up there and there are sitings of him on the voyage.
A collection of interesting character actors besides Beery make Mystery Liner somewhat enjoyable. Here's a hint though, don't be fooled by some of the obvious casting in deciding who are the good and the bad folks here.