Fearing that Jimmy has started drinking again in the wake of his break-up with Siobhan, Kev and Bobby are forced to take drastic action. S3 E4: Bad, Bad Old Days
Jimmy resolves to be a 'proper' Dad and do the parenting without Diana's help. It does not take long, however, for Jimmy's work and social life to suffer. S3 E1: Dawn of the Dad
Diana has taken her grandchildren to Africa to visit their mother, leaving Jimmy in charge. When they come back, a surprise awaits. S2 E1: Web of Deceit