- Box Office Bomb: Budget, £7 million. Box office, $112,132.
- California Doubling: Various locations in the home counties of England stand in for war-torn Northern France during the scenes set in the past, as well as locations in London standing in for New York.
- Follow the Leader: The original script called for an adventure film in the mould of Raiders of the Lost Ark and would have been much more faithful to the original novels. During scriptwriting, however, Back to the Future was released and became a major hit, so the script was duly altered to follow this trend, in an attempt to capitalise on Back to the Future's popularity.
- Hey, It's That Place!: The weapon testing ground scene was filmed in the now disused Beckton Gas Works in London, which was also used for the Vietnam scenes in Full Metal Jacket a year later.
- Promoted Fanboy: Neil Dickson had been a fan of the original books since childhood and was very keen to appear in the film, however when he signed on, there was no final script written.
- What Could Have Been: Jeremy Irons and Dudley Moore were touted to play Biggles.
Trivia / Biggles: Adventures in Time