The Secret Voice

The Secret Voice is a 1936 British thriller film directed by George Pearson and starring John Stuart, Diana Beaumont and John Kevan. The screenplay concerns a scientist trying to prevent his new invention from being discovered by enemy spies.

Premise
A young scientist tries to protect his new invention from being discovered by enemy spies.

Cast

 * John Stuart - Jim Knowles
 * Diana Beaumont - Helen Allinson
 * John Kevan - Dick Allinson
 * Henry Victor - Brandt
 * Ruth Gower - Joan Grayson
 * Monti DeLyle - Perez
 * James Carew - Scotty