Charlie finds that one of his former girlfriends has a son who looks a lot like him.

Charlie tries to resist temptation when he meets the daughter of the woman he's dating and realizes they've met before.

Charlie discovers he is attracted to an older woman who writes self-help books; Jake and Alan fight over a school assignment.

A CSI team investigates a mysterious death at Charlie's house.

Alan plans Evelyn's wedding; Charlie pursues his future stepsister.

Alan fears that Charlie's womanizing is getting out of control.

Charlie goes with Jake on a double date and sets up Alan with a prostitute.

Alan's date, who happens to be a friend of his ex, reveals a secret about Judith's sex life.

Rose comes back from England and takes care of sick Charlie in a very strange way.

Charlie offers Alan pointers on how to break up with a woman.