ER - Season 5 - Eps 5: Masquerade
Halloween night finds the ER awash with allergic or otherwise incapacitated children. Kerry tolerates a visiting candidate for chief while she waits for the official vote. Romano operates on an 11-year-old girl and finds she's genetically male. Carter leaves Lucy in charge of a dorm party he's supposed to be overseeing, with unfortunate results. Mark learns that Jenn's moving to St. Louis--with Rachel. Mark and Carol treat a pregnant schizophrenic.
About ER

Title: ER
First Air Date: 1994-09-19
Last Air Date: 2009-04-02
Status: Ended
Rating: 7.822/10 (from 847 votes)
Language: EN
Seasons: 16
Total Episodes: 331
Network: NBC
Genres: Drama
Production Companies: Hands Down Entertainment, Constant c Productions, John Wells Productions, Amblin Entertainment, Warner Bros. Television, Amblin Television
Synopsis
ER explores the inner workings of an urban teaching hospital and the critical issues faced by the dedicated physicians and staff of its overburdened emergency room.
Cast

Maura Tierney
Abby Lockhart

Parminder Nagra
Neela Rasgotra

Linda Cardellini
Samantha Taggart

Scott Grimes
Archie Morris

David Lyons
Simon Brenner

Angela Bassett
Catherine Banfield

John Stamos
Tony Gates