Trivia

After he saw a rough cut of the film towards the end of the shoot, James Mason insisted that Ann Todd be given equal billing.

The piano playing was done by Eileen Joyce, whose hands were seen in the closeup shots.

The idea for the film came about after Sydney Box was asked to make a documentary about rehabilitation of shell-shocked soldiers using hypnosis and truth drugs. Muriel Box suddenly thought that a wonderful film could be made about the rehabilitation of a famous dancer or violinist.

James Mason: "This was Sydney Box's and Ann Todd's film. But director Compton Bennett and I also profited from its success. 'Welcome' mats were spread out for us in Hollywood."

Ann Todd plays Francesca throughout the film, starting when the character is supposed to be fourteen. She was in her late thirties in real life (and was more than 2 years older than James Mason).