TV 90s

On "Quantum Leap", what are the only things that can see and hear Sam and Al in their true forms?

More Questions from TV 90s
Who is not a character on TV's "The Young Ones"?
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The actress Raven-Symone was on which TV sitcom as a child?
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On "Beverly Hills, 90210", what was Dylan's fathers name?
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Who of these is a "The Kids in the Hall" comedian?
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On "Seinfeld", what is Kramer's phone number?
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In "Twin Peaks", what did the midget tell Cooper was going to come back in style?
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What MTV VJ was named one of the Worst Dressed People of 1998?
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On "Star Trek: Voyager", what was the name of the being created when Tuvok and Neelix became one?
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