Alias John Preston is a 1955 British second feature ('B') thriller film directed by David MacDonald and starring Betta St. John, Alexander Knox and Christopher Lee. It was written by Paul Tabori, and produced by The Danzigers.

A mysterious and wealthy man moves to a small village where he outwardly appears to be a friendly figure but nurses a dangerous secret. He keeps experiencing dreams wherein he is strangling a woman, and tries to figure out what it all means.

The Monthly Film Bulletin wrote: "This static and stagey melodrama is unimaginatively handled, finishing with a trick ending which explains remarkably little. Alexander Knox, as the psychiatrist, brings some degree of plausibility to the proceedings, but the playing generally is characterless."

Kine Weekly wrote: "Its players do their best to bring conviction to the mumbo jumbo, but the task is beyond them. Although it opens promisingly, the play borders on the ludicrous as its climax approaches ...The picture creates interest at the start, but the subsequent flashbacks, which introduce foreign characters, are crude and rob the overall of realism and point. Alexander Knox maintains a professional bearing to the bitter end as Walton, but the others are out of their depth as soon as the tale goes schizophrenic.

Picture Show wrote: "Christopher Lee gives an excellent performance."

The Daily Film Renter wrote: "A beautifully studied performance by Christopher Lee as the perspiring, nightmare-haunted psychotic distinguishes this feature from the average. Scripting is competent, and the gimmick of showing half-real dreams on the screen will keep audiences interested."

In The British 'B' Film Chibnall and McFarlane wrote: "It was a pretty botched job, over-played and under-plotted."

Leslie Halliwell said: "Watchable second feature."