Timeslip (U.S. title The Atomic Man) is a 1955 British black-and-white science fiction film directed by Ken Hughes and starring Gene Nelson and Faith Domergue.

The correspondent and his photographer girlfriend try to solve the puzzle, and in doing so uncover international industrial espionage and a terrible threat to the atomic research institute.

The script for the film was a substantial reworking by Charles Eric Maine of his BBC TV play Time Slip, which was transmitted live on 25 November 1953,[3] and not recorded.

As in his recent The Brain Machine [1956], Ken Hughes' direction is brisk and assured, although he has not here been very well served by the script; the scenes of light relief in particular are somewhat tame.

"[13] AllMovie thought its "absolutely fascinating premise" unfortunately translated into "lack of imagination in the script"; but from an able cast, Faith Domergue was "especially welcome", and the reviewer concluded "The budget is clearly low, but (Ken) Hughes does well with what he has.

Numerous muddled plotlines intertwine, with gangsters and spies trying to exploit his reaction to events before they happen, but nothing too interesting is done with the nifty premise.