AllMovie

A Halloween costume party threatens to degenerate into a "battle of the superheroines" between Monica (Courteney Cox) and Phoebe (Lisa Kudrow). In other developments, Phoebe is introduced to Eric (Sean Penn), the fiancé of her twin sister Ursula (also played by Lisa Kudrow) -- only to find out that Ursula has told a pack of lies about herself to Eric. Ross (David Schwimmer) enters into an arm-wrestling match to impress his girlfriend, Mona (Bonnie Somerville). And Rachel (Jennifer Aniston) comes up with a costly solution when she runs out of trick-or-treat candy.