A lot has changed in 20 years.
by TV Guide News | Aug 29, 2002 4:00 AM EDT
Here's one good reason not to give up on ER yet. Sally Field will reprise her role as Maura Tierney's bipolar mom in a four-episode arc this season. Field who won a guest-star Emmy last year for her ER work reappears during the Nov. 21 episode.
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