"Alastair Sim was apparently very down to earth, and would happily chat with cast and crew alike. During the filming of Green for Danger, one scene required Cockrill to hammer on an operating theatre door in the belief that one of the characters was about to kill another. The scene called for him to smash one of the round panes of glass in the theatre doors, and my grandfather had made a fake pane which would break easily upon impact. The cameras started rolling, and Sim duly hammered on the door ... and hammered ... and hammered; unfortunately it was the wrong pane of glass and refused to break! At this point, my grandfather, who had chatted with Sim on many occasions, forgot he was on set and shouted out "You bloody idiot!". Filming halted, and everyone, including Sim, fell about laughing; many actors would have been aloof, but Sim was one of the few who treated everyone as an equal, and didn't have airs and graces."

Grandson of William Creighton ( who worked for many years in the movie industry as a carpenter and model-maker for the Crown Film Unit and subsequently at Pinewood Studios).

Note: It would seem that Alastair never quite got to grips with this prop because in the final version of the film, although Alastair hammers on the door, it is Trevor Howard as Doctor Barnes who smashes through the window with a theatre stool.

"With the exception of two exceedingly brief shots at the beginning, the film was photographed entirely inside the studio, exteriors and all, in three main complexes, the sets taking up the whole of Pinewood and all standing at the same time - delightful , but terribly expensive." Sidney Gilliat from a National Film Theatre programme note.

"There were in fact no operations, the patient being either dead or dying before the surgeon could sharpen his scalpel; but this did not prevent the British Film Censor from bizarrely putting a total ban on the picture on the strange ground that any wounded soldiers who might see the film (there were still plenty of them in 1946) would be so overcome by the fear of being murdered by one of the nurses that it could seriously affect their chance of recovery. . . . A splendid lunch at the best black market restaurant in Soho restored amity and amour propre and he finally passed the picture with only one cut, the reasons for which still totally escape me." Sidney Gilliat from a National Film Theatre programme note.

Claud Gurney, Gilliat's script collaborator was due to join Launder and Gilliat in Individual Pictures, but he died during production after a car accident.