Brendan's curiosity about K9 is matched only by Sarah's renewed concern over Lavinia's absence. They thus split up and follow their new-found obsessions. Sarah goes into town to question the locals, and Brendan stays behind to test the capabilities of Sarah's new "pet". In town, Sarah discovers that Lavinia has become disliked by some because of her blunt letters to the local newspaper editors about a growing practice of witchcraft in the area. Brendan, meanwhile, is attacked while using K9 to analyse soil samples in Lavinia's garden. His attackers, George Tracey and his son, Peter, are tied into the local coven. George Tracey flees before Brendan can get a good look at him, however K9 uses his laser gun to stun Peter before setting off in pursuit of George. Peter is pinioned and interrogated by Brendan, but makes his escape when Brendan goes outside to investigate a crashing sound which turns out to be the accidental destruction of a greenhouse by K9 in his pursuit of the elder Tracey.