Sean begins to take on the Carver victims, undoing his works and this makes him the Carver's next victim.He is warned that if he is to help another Carver victim, the Carver will kill him, which Sean does.A plastic surgeon nearing middle age and trying to come to terms with his formerly 'perfect' life falling apart.He constantly deals with a mid-life crisis of his youth slowly fading away.
He is the biological father of Matt Mc Namara with whom he has a tempestuous relationship.However, Sean is pretending to be disabled because he's tired of working. Sean meets Teddy (a short replacement for Liz) and they begin to hit it off. She is a black widow who kills her husbands just to inherit money.Teddy suggests Sean and the kids go camping so she could kill them all in an apparent accident.This hurts Liz, and she leaves Mc Namara/Troy, returning to Miami.Although he believes he is getting better, it's revealed his cancer has become terminal and he only has six months left. At the end of the season, Christian is informed he is in remission, but after he has already married Liz.