"Ambush" was the much-ballyhooed live episode of NBC's "ER" that aired in the Eastern and Central time zones on Thursday, September 25, 1997. During the Season 4 opener, hospital personnel watched a telecast of the Chicago Cubs-Houston Astros game that was being played in real time at the Astrodome. The Astros won the contest, 9-1.
The episode also was noteworthy because it introduced British actress Alex Kingston in the role of Dr. Elizabeth Corday. Kingston was an "ER" regular for the next seven seasons.
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