The Lost Hours (also known as The Big Frame) is a 1952 British second feature ('B')[1] film noir directed by David MacDonald and starring Mark Stevens, Jean Kent and John Bentley.

An American returns for a reunion in the United Kingdom, where he served as a pilot during the Second World War, but finds himself framed for a murder he didn't commit.

The Monthly Film Bulletin wrote: "An undistinguished British thriller made with more than one eye on the American B picture market, The Lost Hours has its full share of improbabilities of character and action.

"[7] Kine Weekly wrote: The plot is ingenious and the accomplished cast, headed by a transatlantic star, and resourceful director, backed up by convincing atmosphere, see that there is no lack of suspense.

"[9] The Radio Times Guide to Films gave the film 2/5 stars, writing: "This is one of director David MacDonald's least distinguished ventures, being another of the dreaded quota quickies in which a third-rate Hollywood star gets to play the lead in a threadbare crime story, notable for the cheapness of the sets, the dismal dialogue and the eagerness of the supporting cast.