No Joke Dennis & Gnasher : Season 1 Episode 8
TV-Y (DVD rating) CBBC 12m
Aired: November 10th, 2010 @ 3:40 PM EST on CBBC
The joke shop owner, Mr Har Har, needs Dennis's help to persuade his mother not to close the joke shop down. The gang decides to try and pass Mr Har Har off as a successful vet.
