Clare Monahan

Clare Monahan played by Tracy Keating is an Irish nurse who was Martin's girlfriend in the second series and later his ex. She meets Martin and initially makes a deal with him to lose her virginity, not knowing that he was also a virgin. They start dating and eventually break up due to Martin's inability to trust her around other men, his almost vegetative state, and irreconcilable life paths - Clare wanted to travel the world while Martin did not. She appears in five episodes of series two, and four episodes of series three.

Actress Tracy Keating also makes a further appearance in the final episode as a different character, a woman who Martin pursues because she looks like Clare. Keating plays this part with an English accent.