Timeslip (1955)

Starring Gene Nelson, Faith Domergue, Peter Arne, Joseph Tomelty, Donald Gray
Directed by Ken Hughes
(actor & director credits courtesy IMDB.com)

A magazine reporter and his photographer girlfriend try to solve the mystery of an assault victim's identity, and discover he exactly resembles a nuclear physicist, who is however not missing.

I really enjoyed this science fiction picture from Britain, also known as The Atomic Man, adapted by Charles Eric Maine from his own novel, and starring American leads Nelson and Domergue.  They play collaborators and lovers at a science magazine and have some nice interplay together.  Nelson plays the familiar type of a journalist scuffling with the police for a big story while his irascible boss wants him to cover a more mundane assignment, but is nevertheless likable.  The science fiction content is part of a mystery Nelson has to solve, and is well designed to culminate in a twist you probably won't see coming.  Hughes keeps things moving at a swift pace, and the film is well-photographed with a good music score as well.

The Black Torment (1964)

Starring Heather Sears, John Turner, Ann Lynn, Peter Arne, Norman Bird
Directed by Robert Hartford-Davis
(actor & director credits courtesy IMDB.com)

A nobleman returns with his new bride after a long absence to his estate, only to discover that some claim to have seen him there recently, and he's suspected in a murder.

This is a quality British horror film with some genuine suspense and good performances.  Actor John Turner is especially fine as the nobleman, whose initial righteous indignation at the suspicions levied against him later turns to doubt and horror at the thought that he might be losing his mind.  The performances are supported by effective chills, in particular those created by the filmmakers' use of sound, including the frantic breathing of the murder victim in the opening prologue, the squeaking of the wheelchair carrying the nobleman's infirm father, and the banging of open windows against the side of the house that are normally always locked.  Although the revelation of the truth at the climax didn't come as a huge shock to me, this is still a nicely crafted period horror piece.