Assessment:
Marvellous comedy thriller with most of the gimmicks found not only in Hitchcock's later work but in anyone else's who has tried the same vein.  It has little to do with the original novel, and barely sets foot outside the studio, but it makes every second count, and is unparalleled in its use of timing, atmosphere and comedy relief.

Significant production contributions:
w Charles Bennett, Alma Reville  d Alfred Hitchcock  ph Bernard Knowles  

Significant performances:
Robert Donat, Madeleine Carroll, Wylie Watson, Helen Haye