There is some interesting trivia about the Danger Man series:
- Two episodes of Danger Man's third season are linked in an unusual way. The episodes, "You're Not in Any Trouble, Are You?" and "Are You Going to Be More Permanent?" both feature Susan Hampshire as guest star, however playing different characters in each episode. Nevertheless, both episodes seem to echo one another, with similar lines of dialogue and identical props that are emphasized in both episodes (in particular, a doll). Additionally, the characters played by Hampshire are the only ones with whom actual romantic involvement with Drake is implied (one of the episodes ends with Drake and the girl going on holiday together -- something virtually unheard of in this series). These two episodes also feature the song "Mio Amore Sta Lontano," which was used in other episodes as well.
- An image of a penny farthing bicycle (the symbol used throughout The Prisoner) is visible on the wall of one of Drake's superiors in one of the hour-long episodes.
- The Danger Man theme later served as the signature tune for Mark Radcliffe's late-night BBC Radio 1 show during the mid-1990s.
- Danger Mouse is a British animated television series which was produced by Cosgrove Hall Films for Thames Television. It features Danger Mouse, a British mouse who works as a secret agent. The show is a loose parody of British spy fiction, particularly James Bond and the Danger Man series starring Patrick McGoohan.