The Foxbusters

Season 1, Episode 9: Going Underground

Select Source

The foxes have been kidnapping rabbits and forcing them to dig a tunnel to the farmyard. Sims seems to be acting a bit odd as the Foxbusters go down the tunnel. The girls gets trapped in one of the tunnels and it's revealed that Sims has Claustrophobia. Moleier soon comes to rescues them along with a young rabbit called Billy and they all thwart the foxes' scheme.