Actor Allusion: In "The Hold Up", Mr Harman comes up with a plan with Mrs Slocombe and Mr Humphries to rescue the others by dressing up as the dreaded Gumby Gang. As Pa Gumby, actor Arthur English as Mr Harman is dressed up as a character he was most famous for doing years prior to the show: a shady "spiv" character, complete with pencil moustache and wide tie.
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.
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.
Playing Gertrude: Nicholas Smith (Mr. Rumbold) is only nine years older than Wendy Richard (Miss Brahms).
Reality Subtext: The series' creators 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 (numerous others). 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.
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).
Write Who You Know: Jeremy Lloyd based the characters on employees he encountered while a department store worker.