A batty Scottish professor attempts to prove the existence of the Loch Ness Monster, but everyone thinks he's crazy. Meanwhile, a foolish young reporter attempts to get a scoop on the story.
| Actor | Role |
|---|---|
| SSeymour HicksProfessor Heggie | Professor Heggie |
| NNancy O'NeilAngela Heggie | Angela Heggie |
| FFrederick PeisleyJimmy Andrews | Jimmy Andrews |
 Gibson GowlandAngus | Angus |
| EEric HalesJack Campbell | Jack Campbell |
| BBen FieldPiermaster | Piermaster |
| HHubert HarbenProf. Blenkinsop Fothergill | Prof. Blenkinsop Fothergill |
 Rosamund JohnMaggie Fraser | Maggie Fraser |
| RRobb WiltonReporter | Reporter |
| FFewlass LlewellynScientist at Meeting | Scientist at Meeting |
| SStafford HilliardMacdonald (Uncredited) | Macdonald (Uncredited) |
| CCyril McLaglenMate (Uncredited) | Mate (Uncredited) |
 Clive MortonReporter (Uncredited) | Reporter (Uncredited) |