At Monica's Halloween party, Phoebe meets the friendly fiancé, Eric (special guest star Sean Penn - Dead Man Walking), of her flighty twin, Ursula. Phoebe becomes alarmed when she learns that her sister has misrepresented herself to the trusting guy--and Phoebe finds herself attracted to him as well. Monica comes disguised as Catwoman and wonders if she could defeat Phoebe's Supergirl character. Chandler arrives as a pink bunny and mistakes Ross' giant Spudnik costume for something found on a sidewalk. Also, Rachel gives away all the candy and guiltily resorts to writing checks for the trick-or-treaters.
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