The Upturned Glass is a 1947 British film noir psychological thriller directed by Lawrence Huntington and starring James Mason, Rosamund John and Pamela Kellino. The screenplay concerns a leading brain surgeon who murders a woman he believes to be responsible for the death of the woman he loved. It was made at Gainsborough Pictures' Islington Studios, with sets designed by the art director Andrew Mazzei. It was made as an independent production overseen by Sydney Box, then head of Gainsborough.