Single-Handed S04E03 - Between Two Fires (1)

Jack investigates the suspicious fire of an unfinished house which belonged to his friend Killian Kinsella. Killian informs him that he sold the house to Dennis Costello some weeks previously. Shortly afterwards the body of Killian's sister-in-law Niamh Duffy is found dead in the burnt out house. Jack suspects that Dennis had a hand in the fire and sets out to prove what happened. Meanwhile, Jack kisses his cousin's girlfriend Gemma and also finds out that Finbarr slipped plans for Dennis's nightclub past him and he is far from pleased. Elsewhere, Dennis calls in Jack's old boss to help him deflect evidence of the fire away from him.