3x9 - The Clinic

Dan is terrified when he realises he could be caught out for dating both Cathy and Sinéad and tries to find a way to prevent them meeting. Dan is thwarted when Sinéad meets Cathy. He tries to talk his way out of it by telling Cathy it was her idea to have a no strings attached relationship and as soon as they started to get serious he finished with Sinéad.