Run Rabbit Run
Dennis's mum is looking after Walter's rabbit while he is away and Dennis, trying to be nice, accidentally lets it loose and then Gnasher chases it away. Dennis and Mum try to find the rabbit, but with no luck. When Walter unexpectedly returns, Dennis disguises Gnasher as the rabbit to fool Walter, while he continues to search for it.
Discovering the rabbit being chased by a cat, Dennis calls on Gnasher for help, and together they mount a rescue operation to save it.