- Acting for Two/Talking to Himself: In the nineties series, Dad and the Colonel were both voiced by John Baddeley, while Eve Karpf voiced both Mum and Matilda.
- Cowboy BeBop at His Computer: It's often assumed by the media that Dennis is no longer whacked with a slipper at the end of each strip because it wasn't politically correct. In truth, the practice of slippering had already become old hat by the time it was axed in the comic, and getting rid of it allowed for less predictable endings.
- Cross-Dressing Voices:
- Dennis was voiced by Sophie Aldred for the first season of the 2009 series.
- Walter was voiced by Judy Bennett in the 1990s series.
- Executive Meddling: Walter's girlfriend Matilda was created to dispel Moral Guardian rumours that Walter was gay and Dennis was homophobic.
- After a few years the character of Matilda was dropped and Walter was made less flamboyant.
- Keep Circulating the Tapes: The first adaptation of Dennis the Menace was a puppet series shown on an early cable television station called The Children's Channel during 1990 and 1991. Virtually nothing about the show has been documented online, and the show's existence is rarely acknowledged by DC Thomson. It doesn't even get a mention in the 70th Anniversary book, History of the Beano or Ray Moore's Beano Diaries.
- Missing Episode: CBBC skipped episode 26 of the 2013 series for unknown reasons.
- International Coproduction: Dennis and Gnasher - Australia (Sticky Pictures) and the UK (Red Kite Animation).
- The same goes for the 2013 series Dennis the Menace and Gnasher also made in Australia and the UK with the same companies as before.
- Name's the Same as the American Dennis The Menace character. The two are not related but coincidentally debuted the same month. Both works change their names subtly in each other's respective home bases to avoid confusion.
- No Export for You: The 2009 series is the only one to make it to the States- and even then, The Hub dropped after a year or two.
- Un-Canceled: The second animated series is set to return mid-2013 to coincide with the 75th anniversary of The Beano.
Trivia / Dennis the Menace (UK)