Endangered Species - S3.E8

Mentally handicapped man - David Stockwell who lives with his elderly mother hears dogs barking in the woods at night and goes to investigate, but his mother follows him and gets injured in a hit and run when a Land Rover cuts her down in the woods. David runs to the pub for help and Nick and Kate get David's mother to the hospital. Nick asks David what happened and he tells Nick about the dogs and the Land Rover, however the next morning after David speaks to his mother his story changes and he insists she only fell. Nick suspects his mother is protecting someone and goes to the hospital to talk to her, but she also insists she fell. Nick is still suspicious and continues his investigation into the accident. Meanwhile David finds an injured badger in the wood and takes it home and with Kate's help nurses it back to good health. Nick meanwhile suspects the Land Rover was driven by badger baiter's and Claude shows him a recently dug up badger set near David's home. Nick then goes to see