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
Alex Kingston joined the cast of "ER", during which season?
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In "Star Trek: The Next Generation", what is Data's cat's name?
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In "Dr. Quinn, Medicine Woman", what do Dr. Mike, Preston, and Andrew Cook all have in common?
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On "Xena: Warrior Princess", which of the following is NOT one of the Titans Gabrielle freed?
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Who starred in the 90s TV series "Cybill"?
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Who plays Neeley on "Baywatch"?
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On the TV show "ER", how much money did Ray leave for Doug?
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What period of time has Dann Florek been on "Law & Order"?
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