Aine tells Frank that things are getting serious between her and Peter-Brian, prompting him to join forces with Doofus to expose the object of her affection. However, in the process of collecting evidence against him, Frank starts to fall under Peter-Brian's spell - and Doofus worries that Frank has fallen for the `enemy". Meanwhile, Mary takes on a tenant or two to help cover the mortgage. Comedy, with Brian Gleeson, Domhnall Gleeson, Pom Boyd, Sarah Greene and Tom Vaughan-Lawlor.