Hostility on the Set: Lead actor Frankie Howerd and producer David Croft didn't get on during filming due to Howerd's insecurities, strange behaviours, and how it took him long to learn the script. Despite this, Croft still respected how the audience adored him and how he performed the material he was given.
The Other Darrin: The character of Senator Ludicrus Sextus was originally played by Max Adrian in the first series, then by Wallas Eaton in the second. There was no reason offered for the change; Adrian was a red-haired middle-aged man whilst Eaton played a grey-haired old man. A throw-away line was offered that the Senator had gone for a face-lift, but the lift broke down halfway through the procedure.
Wag the Director: Frankie Howerd got several actors (including Fabia Drake) dropped from the show because they didn't get on with him, much to the disdain of producer David Croft.
In addition to playing Gorgo, Bernard Bresslaw also provides the voice of the prisoner who steals Lurcio's bread.
Billing Displacement: Julie Ege is featured prominently on the poster alongside leading man Frankie Howerd, but has some of the least amount of screen time out of all the stars.
Fake Nationality: The entire cast is made up of Brits playing Pompeiians and Romans.
Follow the Leader: Nat Cohen's inspiration to make a film version of Up Pompeii was due to the fact he had noticed how profitable spin-off films of TV series were, most notably being jealous of how successful The Movie of Till Death Us Do Part was.
What Could Have Been: The idea for the Distant Finale came later, as the screenplay ended with Lurcio accepting his fate during the destruction of Pompeii.