Dermot was a businessman who did business with Butlers Farm. Dermot arrived to see Moira Dingle to complain about screws found embedded in the burgers she delivered the previous day, unaware they were planted by Caleb Miligan. Dermot stated he couldn't take the risk that the same incident wouldn't happen again, but eventually gave Moira one more chance because he respected her and her reputation. However, after receiving a call from Health and Safety that someone made a complaint against Moira, Dermot called Moira to end their deal as he didn't want his business to receive bad publicity.