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
In the summer of 1996, what VJ subbed in for Jenny McCarthy on "Singled Out"?
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In the first season of "ER", medical student Carter was in which year at school?
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Which is the name of the 90s Bill Maher hosted talk show about politics?
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On "NYPD Blue", what was the worry about Andy's youngest son at the end of the seventh season?
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On TV's "Beverly Hills, 90210", why did David and Donna break up?
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Who was Roy paired with when they played Trivial Pursuit on "Wings"?
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Complete the name of the kids action TV series, "Mighty Morphin Power _____"?
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Which Cartoon Network show involved bovine, poultry, and The Red Guy?
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