Mr. Treeger (Michael G. Hagerty): the superintendent of Monica's building. Treeger first appears in "The One Where Heckles Dies", where he shows Mr. Heckles's lawyer to Monica and Rachel's apartment. He next appears in "The One with Phoebe's Dad", where Monica thinks he is playing hardball by not mending her broken radiator, and Treeger is left bewildered as Ross, Monica and Rachel repeatedly attempt to convince him to have it fixed despite his attempts to explain that he will not be able to replace the knob Ross accidentally broke off because the shop does not open until the following Tuesday. Later, when Joey rebuffs him for putting down Rachel, he threatens to have Monica and Rachel evicted unless Joey helps him practice ballroom dancing to impress a woman (as Monica is illegally subletting the apartment which actually belongs to her late grandmother, to Treeger's irritation). In "The One with the Free Porn", he cleans the shower drain of Chandler and Joey's newly-won apartment, and warns them never to turn off their TV after they start receiving free porn. In his final on-screen appearance, he has a fireman break down the door to Monica's apartment after Joey tells him he smelled gas while she and Chandler are away on their honeymoon. He is mentioned in the series finale when Monica said to everyone he needs their keys to her and Rachel's apartment.