S1E23 · Invasion of the Buddy Snatcher

When Greg hosts a poker game, Dharma takes advantage of the occasion to meet his buddies. Petty jealousies surface as she begins befriending the men and privately advising them on personal matters - including bankruptcy, impotence, and a serious crush one of the men has on Greg - and they in turn begin to full uncomfortable around Greg because he won't share his feelings with them. Upset that Dharma has taken over his friends, Greg tries to bluff her by maintaining that he has plans of his own to hang out with Jane; and when Dharma thinks this an ""awesome"" idea, he finds himself involved in a bizarre role-playing game with Jane's very bizarre friends (including the Vulcan-eared Trekkie seen at the end of episode 20). Meanwhile, Kitty and Edward are unhappily afloat in ""duck soup,"" as their swimming pool is invaded by waterfowl. Enter Abby, who is getting a Berkeley degree in ornithological intelligence. (Larry: ""It's the study of bird brains."" Kitty: ""Oh, that must be useful."")