In episode 1 of "Kat & Alfie: Redwater", Kat (referred to as "Kathleen" in the series), Alfie and Tommy arrive in the Irish town of Redwater, where Kathleen is almost immediately convinced that Andrew Kelly (Peter Campion) is her son, while Andrew's grandmother, Agnes Byrne (Fionnula Flanagan) is suspicious of her. Alfie warns Kathleen to wait for the right time and make friends first, but Kathleen confides in Agnes's husband Lance (Ian McElhinney) that her son was taken away from her in 1983 and she believes he is in Redwater. Lance tells Agnes this, and Agnes immediately says Kathleen should not be told the truth as it would unravel everything they have built. Kathleen visits the Byrnes' farm and talks to Andrew about his life, but then Lance warns him to give the Moons a wide berth. Kathleen then admits to Alfie that she is scared of seeing how disappointed her son would be in her. Lance tells the local priest, Dermott Dolan (Oisín Stack), that Kathleen is his real mother. It is revealed that Iris Dolan (Orla Hannon) lost a baby in London and brought Dermott back as her own, and her husband Peter (Stanley Townsend) does not know the truth. The next day, Dermott murders Lance by drowning him.