Robert Hamer made a major contribution to the screenplay and hoped to return to directing with this film. However, he was too far gone in alcoholism for the producers to risk hiring him, and, indeed, he died at age 52 several months before the film appeared.
In the BFI Library the micro-jacket publicity cast list credits Geoffrey Bayldon in one PR handout as Epicene, while in another Alan Wheatley is credited as Epicene.
Bowles-Ottery quotes from 'The Rising Sun' by John Donne (1572-1631): "Busy old fool, unruly sun, / Why dost thou thus, / Through windows, and through curtains call on us / Must to thy motions lovers' seasons run"