Below the Surface is a 1938 adventure film set in the coal region of Newcastle, Australia.
The main investor in the movie was a prominent music house in Sydney.
[3] Like Kathner's first movie, Phantom Gold (1937), it was refused to be considered eligible for registration under the New South Wales Film Quota Act on the grounds of poor quality.
[3] The film was never released to cinemas, the only one of Kather's movies to suffer this fate.
[4] In February 1938 Australian Cinema Entertainments announced plans to make four more features that year for £40,000, the first which was to be Diamonds in the Rough.