When Charlie and Lyndsey realize they have gambling in common and become friends, Alan's jealousy gets the better of him.  He begins to suspect they're sleeping together and gets uninvited from Lyndsey's housewarming party and his keys taken away.  Alan sneaks by the party to spy but gets sprayed by a skunk.  Alan gets help from Herb in the form of V-8 and ketchup, but neither do the trick and just make him look extra crazy when he breaks into the party and accuses Lyndsey in front of all her guests.