Director: Edward Dmitryk
Art director: Alex Vetchinsky
Dir. photography: C. M. Pennington- Richards
Special effects: Francis carver ( photography) Syd Howell (Process projection) Bill Warrington (overall special effects)
Matte paintings: uncredited.
They recreated New York city at Denham studios, London. There is not matte artist credited although we can see some wonderful matte paintings. The most reasonable option would be Percy Day, but he moved his matte department from Denham to Shepperton after filming Black Narcissus (1947) and again, it is difficult to think that he had worked in a movie during those years without credits. the paintings may be handled by some of his woman assistants, Joan Suttie or Judy Jordan , maybe with Les Bowie or some other of the young British matte artists.
There are also some beautiful backdrop paintings.