[4] Professor Heggie is determined to prove to a sceptical scientific community the existence of a dinosaur living in Loch Ness.

It was made by Bray Wyndham, an independent producer using Ealing’s studios and technicians while Basil Dean had a dispute with RKO.

Director Milton Rosmer was borrowed from Gaumont, although George King was originally announced for the job.

[5] Charles Bennett and Billie Bristow visited Loch Ness in December 1933 to research the film.

TV Guide called the film "a trite programmer which doesn't make one believe in the humans' actions, much less the sea serpent's";[10] while Allmovie called it a "fairly amusing British monster movie...obscure but entertaining oddity";[11] and Britmovie noted an "enjoyable comic romp.