TV 90s

Who guest starred on TV's "ER" as Madame X, the Alzheimer's stricken singer?

More Questions from TV 90s
Who is not a character on TV's "The Young Ones"?
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On the TV show "Buffy the Vampire Slayer", what is Buffy's last name?
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In "Star Trek: Deep Space Nine", after the mine field who destroyed the Jem'Hadar reinforcements?
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In "Sabrina The Teenage Witch", what percentage of Sabrina is actually a witch?
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On "Buffy the Vampire Slayer", what is Cordelia's last name on the show?
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On "Home Improvement", what was Jill's father's occupation?
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What is "The X-Files" character Mulder's favorite snack food?
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On the show "Boy Meets World", who is Shawn Hunter?
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