Mr. Nonsense's Strange Illness is the 25th episode of the third season of Mr. Men and Little Miss. It was first broadcast on 4 March, 1997.
It is the day of the Nonsenseland competition and, like every year, Mr. Nonsense is the favorite. But, he loses his memory after receiving a nasty bang on the head and can’t even remember that he is called Mr Nonsense! The jury find this idea so nonsensical that he carries off the Nonsenseland cup yet again
- Little Miss Fun (cameo)
- Mr. Cheerful (cameo)
- Mr. Impossible (cameo)