The Secret of the Loch

The Secret of the Loch is a 1934 film about the Loch Ness Monster. It is the first movie made about the monster.

Professor Heggie is determined to prove to a sceptical sciencific community the existence of a dinosaur in Loch Ness. Young London reporter Jimmy Anderson believes him and offers to help. He also falls in love with Maggie, the professors daughter. Jimmy finally plucks up the courage to enter the Loch himself, and comes face to face with the monster.TV Guide called the film a trite programmer which doesnt make one believe in the humans actions, much less the sea serpents while Allmovie called it a fairly amusing British monster movie...obscure but entertaining oddity and Britmovie noted an enjoyable comic romp. ........

Source: Wikipedia