. In the episode "Lee Harvey Oswald," a lieutenant with the name tag "D. Bellisaro" is seen. This is a reference to producer Donald Bellisaro who served with Lee Harvey Oswald in the military.
. In the episode "A Portrait for Troian", the image that Sam sees in a mirror of himself is of producer Donald Bellisaro.
. In the episode "Another Mother - September 30, 1981", the part of Teresa is played by Troian Avery Bellisario, daughter of Quantum Leap executive producer Donald P. Bellisario and co-executive producer Deborah Pratt. Also, their daughter's name is used in the episode, "A Portrait for Troian - February 7, 1971," with Deborah Pratt playing the title role.
. Quantum Leap has several references to producer Donald Bellisaro's previous series, "Tales of the Gold Monkey" (1982), including a character named "Gushie". The QL episode "Ghost Ship" featured Captain Cutter, who was the main character in Tales of the Gold Monkey.
. Star Scott Bakula wrote and performed all the original songs in the episode, "Piano Man."
. The bar in the final episode is modeled after the bar that series creator Donald Bellisario's father had owned.
. In the episode "All Americans", which originally aired on January 17, 1990, Al states he was watching SuperBowl XXX, and the Pittsburgh Steelers were playing. The actual game wouldn't air for another 6 years, however, the Steelers did play. The team hadn't been to the SuperBowl in the ten years prior.
. The episodes "Return of the Evil Leaper" and "Revenge of the Evil Leaper" were originally aired as a two-hour "movie," but the titles of each hour were shorter. They were simply "Return" and "Revenge" respectively.
. Scott Bakula's daughter Chelsy appeared in the episode "Memphis Melody."
. In the episode "Memphis Melody," Sam leaps in as a young Elvis Presley. At one point in the episode, Elvis sings at a talent show. When Elvis is offstage, we hear a saxophone solo in the background. Then we hear the announcer say "That was young Billy C., from Hope, Arkansas!" A young boy then walks by, carrying a saxophone. The boy is the future President of the United States - Bill Clinton (who really does play the sax).
. Dean Stockwell was the first to 'Leap' through time on an Episode of the Twilight Zone: 'A Quality Of Mercy' (12/29/61) playing a war hungry US Lt. in August, 1945.
. 'Bruce Mcgill' actually appeared twice the in the series playing two different characters on the show. He was actually in the first episode playing Weird Ernie and in the very last episode playing Al, the Bartender. Although many people from the previous episodes in the last episode as "leapers" themselves. His seemed to be the only one that was a completely different from the character he portrayed in the first episode. Though looks can be deceiving.
. Sam Beckett is revealed to have attended MIT, and Al (Calavicci) is mentioned to have also spent some time there.
. In the episode "Another Mother", the opening aerial shots of the suburban neighborhood are the same shots that were used in the opening of Poltergeist (1982).
. Al Calavicci drives two different Ferarris in the series: in the pilot episode, he is in a red Testarossa (which is shown from very low angles so as to keep the identity of the car hidden), and in the episode "Killing Time" he is driving a Mondial Cabriolet.
. Ranked #15 in TV Guide's list of the "25 Top Cult Shows Ever!" (30 May 2004 issue).
. The character 'Sam Beckett' was ranked #12 in TV Guide's list of the "25 Greatest Sci-Fi Legends" (1 August 2004 issue).
. Season One's cliffhanger into Season Two was the teaser for the episode "What Price Gloria?" The next season, three other episodes premiered before "What Price Gloria?" aired.
. There were several ideas for episodes which ultimately were never used. One had Sam leaping in as Robert F. Kennedy; another idea would involve an animated episode; the producers even toyed with the idea of leaping Sam in as a baby. Also, Don Bellisario wanted to do an episode where Sam leaps in as Thomas Magnum (from "Magnum, P.I."); it is unclear why that episode never materialized, although in an earlier episode a character is seen watching "Magnum, P.I." thus establishing that show as fiction within the QL "universe".
. Throughout the series, Sam meets many "future" famous people, including Buddy Holly, Micheal Jackson, Marilyn Monroe, and Bill Clinton, as well as leaping into Lee Harvel Oswald and Elvis Presly.
. Al's cigar was the idea of actor Dean Stockwell, who said it was, "a good way to get free cigars for five years".
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