Charlie and Mia plan their wedding.

Charlie's ex-girlfriend, Mia, comes back in town with an unexpected request, which Charlie follows with an unexpected question of his own.

Charlie and Alan help Jake prepare for his first boy-girl party.

Alan finds he has more in common with Jake's teacher than with Kandi.

Charlie is sleeping with Kandi's mother as Alan tries to win Kandi back.

Kandi moves in with Alan, causing tension in the house.

Alan becomes financially strapped when he starts paying his young girlfriend's bills.

Charlie is nominated for an advertising award against his arch nemesis who always wins.

Alan tries to avoid bringing his sexy 22-year-old girlfriend to Jake's birthday party.

Charlie's lifestyle causes tension with Mia.

Charlie plans the ultimate romantic evening with Mia, and Alan dates a much younger woman.

Charlie must deal with the challenges of a committed relationship that is not based on sex.

Alan's emotional breakdown sends Charlie into therapy.

Alan dates a Martha Stewart-like woman who takes over the house during the Christmas holidays.

Charlie helps Alan cope with his lifelong obsession to get women's approval.

Wealthy, elderly woman sets her sights on Alan.

Charlie cons Jake into taking ballet lessons in order to get close to the teacher.

Rose's father confronts Charlie about his intentions towards his daughter.

Alan is convinced that Charlie's new girlfriend has put an evil curse on him.

Bout of impotence causes Charlie to reexamine his feelings toward women.

Berta moves in for a few days and sets Charlie and Alan at each others' throats.

Charlie organizes an intervention to keep Alan from reuniting with Judith.

Charlie turns Alan's chiropractic office into a brothel while Alan tries to avoid offending a large-breasted woman.

After Alan falls off the roof trying to fix the satellite dish, Charlie volunteers to look after Jake for the weekend.