The Quinns play host to Katya, one of a group of Ukrainian children who have been sent from their homeland in the wake of the Chernobyl nuclear disaster. But while Erin is excited about sharing her wisdom with her house guest, Katya turns out to be a lot less grateful to be in Derry than expected. Meanwhile, the rest of the family has other preoccupations - a new development in Granda Joe's love life that leaves his daughters deeply unimpressed