S19·E10 Episode 1425 (Thu 1st Feb 1990)

Zoe receives the results back from the laboratory - they prove her right, the contamination is Cryptosporidium. Seth explains the bug to Alan and tells him that he has got a sick note for a fortnight. Sarah clears out Matt and Dolly's furniture from the cottage. Zoe calls to see Alan and tells him about the contamination; she also mentions that his fish farm could have been polluted from the slurry at Emmerdale Farm. Alan storm up to see Joe and tell him he'll be informing the National Rivers Authority. Zoe offers to test their calves. Amos calls to see Frank at Home Farm and tells him about the Koi carp found at The Woolpack. Jack asks Zoe if she has dropped out of university and tries to give her some advice and encouragement; she seems to listen to him.