Quantum Leap is a science fiction television series that aired from 1989 to 1993. The story follows Scott Bakula as Dr. Sam Beckett, a scientist who has invented a machine that allows someone to travel back in time throughout their own lifetime, briefly inhabiting the body of another individual.
- During an appearance on The Pat Sajak Show in 1989, Sajak commends his guest Kermit the Frog on hosting a prime-time TV series. Kermit says it's just the beginning, and cites a few shows coming up with frogs in the works:
- Kermit: [We've got]... Quantum Leap-frog.
- Sajak: I'd watch that!
- Kermit: Yeah, that's a good one.
- A commercial in the 1991 Dinosaurs episode "Charlene's Tale" advertises a show comprising elements of various TV shows, including a character who "leaps through time".
- In the second season episode "Another Mother", Sam leaps into a mother of three kids. The older two see Sam as their mother, but the youngest can see Sam in her mother's place. The older daughter asks what's wrong with her, and the brother suggests she's having a breakdown, "Too much Sesame Street." He reiterates his observation later when the youngest daughter still sees Sam, but also his holographic companion, Al.
- Debbie Allen played Joanna Chapman in "Private Dancer" (1991)
- Michael Carter played P.J. DeCaro in "Dreams" (1991)
- Marietta DePrima played Lorraine in "Piano Man" (1991)
- Neil Patrick Harris played Mike Hammond in "Return of the Evil Leaper" (1993)
- Teri Hatcher played Donna Eleese in "Star-Crossed" (1989)
- Chaim Jeraffi played Ali in "The Curse of Ptah-Hotep" (1992)
- Bob Saget played Mack MacKay in "Stand Up" (1992)
- Reni Santoni played Sgt. Lopez in "Lee Harvey Oswald" (1992)
- Brooke Shields played Vanessa Foster in "Leaping of the Shrew" (1992)
- Patrick Warburton played Blaster in "The Leap Home: Part 2" (1990)