- Actor-Shared Background: In the final episode, "The Pop Star", Mr Spooner is revealed to be a talented lead vocalist. Same for his actor Mike Berry.
- The Cast Showoff:
- Mr. Spooner, was played by singer Mike Berry. The last episode was centered around Mr. Spooner trying to break into the pop music scene.
- Nicholas Smith, who played Mr. Rumbold, could play various musical instruments, a talent which was exploited in a number of episodes.
- John Inman was renowned in his younger years as a "pantomime dame", hence his frequent appearances in drag or outlandish costumes over the course of the series.
- Dawson Casting: To a minor extent. Mr. Lucas was supposed to be in his mid-twenties when the show began, but the actor, Trevor Bannister, was 36 years old. In fact, he was only a few months younger than Nicholas Smith, who played Mr. Rumbold, and nearly a year older than John Inman, who played Mr. Humphries. Inverted for "Old" Mr. Grace who was played by Kenneth Waller age 54; his younger brother was played by Harold Bennett, who was 28 years older.
- Dye Hard: It can be strange to see Mollie Sugden in interviews with her normal brown (or grey) hair. (The latter is a bit easier for those who have watched Grace and Favour/Are You Being Served Again).
- Name's the Same: Both of Miss Shirley Brahms' Suspiciously Similar Substitutes in the Australian version of the show were named Shirley Buxton and Shirley Nichols.
- The Other Darrin:
- Mrs. Peacock, who makes appearances in a few episodes, was played by two actresses named Diana; Diana King played her in most of her appearances, and Diana Lambert played her in the character's final two appearances in the series.
- Diana Lambert had previously played a customer named in the credits as "the Six-Pound Fox Customer" in the Season One episode "Fifty Years On."
- The one-off 2016 revival featured the original characters played by a brand-new cast of actors.
- Old Shame:
- The 1981 Christmas Special "Roots?" (named after the seminal US miniseries Roots (1977)) has the main cast performing a routine in blackface obviously inspired by the old Minstrel Shows type routines - this episode is rarely repeated as a result.
- "Top Hat and Tails", the second episode of Season 4, was a "Young Shame". The episode aired infrequently due to a ballroom dancing scene depicting Mr. Humphries and Captain Peacock dancing together. Though almost universally absent in syndication, it saw the light of day more frequently from the late 90s on. Some sources describe it as a lost episode, so this may be an aversion.
- Playing Gertrude: Nicholas Smith (Mr. Rumbold) is only nine years older than Wendy Richard (Miss Brahms).
- Reality Subtext: Creators Jeremy Lloyd and David Croft have implied that Mr. Humphries was promoted to senior salesman because so many of the elderly actors who had previously appeared on the show died (Arthur Brough, Harold Bennett), retired (James Hayter), or just didn't work out (Alfie Bass, Milo Sperber, Benny Lee, Kenneth Waller). The younger, healthier Inman was already known to the audience and reliably funny, so the producers felt they could count on him to stay around for several years. Thus, they made Humphries the senior character, and never cast a new middle-tier salesman. John Inman, in turn, asked Lloyd and Croft not to have Humphries' promotion be mentioned on screen, as he was superstitious of all the elderly actors before him.
- Throw It In!: The running gag of the store's lifts never working properly came about because they could never get the set to work properly on a regular basis and decided to work the problems into the plots to save time and money.
- Write What You Know:
- Co-writer Jeremy Lloyd was inspired originally by his stint working in the menswear department at Simpson's of Piccadilly (a now-defunct London department store).
- Furthermore, John Inman, the most popular cast member, was working in retail when he auditioned.
- The lovely Simpsons building now operates as the flagship of Waterstones booksellers and it may please fans to know that there are meeting rooms called Slocombe and Peacock
- Write Who You Know:
- Jeremy Lloyd based the characters on employees he encountered while a department store worker.
- He's not the only one; one day, Mollie Sugden, who played Mrs. Slocombe, was at a department store when one of the employees told her that he had previously worked with John Inman, and asked for Sugden to give Inman his regards. When Sugden asked Inman if he remembered that particular employee, his response was, "Remember him? I got the walk from him!"
Trivia / Are You Being Served?