The Great Spontini - May 9, 1974 - S3-E8
Audio problem: When Jamie says, "Where's your sense of humor?" her lips aren't moving, or are out of sync. (00:26:30)
Her Charm - September 26, 1973 - S2-E15
Continuity mistake: The FBI agent's car is riddled with bullets in the opening scene. A few shots later, the same car rounds a corner during the chase, and all the bullet holes have disappeared. (00:03:30)
The Leap Home (1) - November 25, 1969 - S3-E1
Continuity mistake: The corn stalks behind Sam and Al are rustling and moving in a brisk wind in the two-shots. But in all the close-ups, the stalks are standing perfectly still. (00:35:25)
Good Night, Dear Heart - November 9, 1957 - S2-E17
Audio problem: When Sam and the Sheriff are on the dock the Sheriff is talking through a shot into the next one, except his mouth isn't moving during the last seconds of his line.
Continuity mistake: In the scene in the courtroom, when Kevin is being questioned by the prosecutor, she introduces several photos of Katie to the judge. The judge keeps two or three of them, and the prosecutor carries one to the witness stand. As she is carrying it to the stand, it can be seen that it is a photo of Katie wearing a dark top, with what appears to be a fluorescent light over Katie's head. The prosecutor then places the photo on the stand for Kevin to view, and it shows Katie wearing a white hospital gown with blue dots. After the prosecutor questions Kevin, the defense attorney walks over to the stand and picks up the photo. This time, it shows Katie in a red v-neck top, with no light above Katie's head. (00:30:35)
Her Charm - September 26, 1973 - S2-E15
Audio problem: When the two bad guys are chasing the girl through the dark forest, one says "it's too dark," the girl screams, and the other says, "who needs light?" - but both say these without moving their lips.
Her Charm - September 26, 1973 - S2-E15
Continuity mistake: After the bad guys attack the laundry truck and the girl starts throwing bags out of the truck, one sees in the close up shot a bullet-ridden gray door, but in the wide angle shot it's a pristine brown door.
M.I.A. - April 1, 1969 - S2-E22
Continuity mistake: Near the beginning, when Sam is undressing and Al is telling him who he leaped into, in one shot Sam is taking off his beaded necklace and in the next his necklace is off and he's taking off his belt, but Al continues the sentence so no time passed during the cut.
Revealing mistake: Almost every time Sam looks in a mirror or the viewer sees Sam in a mirror, the movements of Sam and Sam's "reflection" hardly ever match up correctly as if it were Sam's real reflection.
Pool Hall Blues - September 4, 1954 - S2-E18
Revealing mistake: After Al comes back when the power is turned on, Sam wins a game, breaks for the next and then we see a wide angle shot and the noise is made when Al shows Sam where to shoot. But the beam doesn't appear, even though the shot is seen by viewers.
Sea Bride - June 3, 1954 - S2-E21
Continuity mistake: At the end when Sam punches out the bad guy, there is not a white piece of trash stuck to the back of his left shoulder. Two shots later, there is a white piece of trash there.
Play Ball - August 6, 1961 - S4-E2
Continuity mistake: The mud stain Sam gets in his slide covers most of the front of his baseball jersey. But a few shots later, it becomes a much smaller streak on just the left side. (00:06:30)
Private Dancer - October 6, 1979 - S3-E14
Revealing mistake: When Sam is studying the sign language textbook and Al pops in, Sam's right hand makes a noticeable jump, though it's supposed to look like a continuous take. (00:20:10)
M.I.A. - April 1, 1969 - S2-E22
Audio problem: When Sam, dressed as a guru, is talking to Al about Beth, Al calls the lawyer a "scuzzbag" but he mouths "scumbag." Guess it couldn't get past the censors.
Leaping in Without a Net - November 18, 1958 - S2-E19
Continuity mistake: In practice, when Sam's sister tries to do the triple and he misses her, the wide angle shot shows that she is already below Sam's arms when she reaches out. But when it cuts to a close shot, she is able to almost catch his arms.
Piano Man - November 10, 1985 - S3-E15
Continuity mistake: Sam is driving a beat up truck along a road and talking to Al about where Lorraine is. During this sequence it's foggy/smoky in almost all angles, except the view behind their vehicle. It's a shot of a sunny road. Where is the fog behind them?
The Wrong Stuff - January 24, 1961 - S4-E7
Factual error: Al says he was an astronaut and flew around the moon, describing a mission that sounds precisely like Apollo 8 (10 orbits around the moon, reading of Genesis, etc). In the season 2 finale episode 'MIA, ' set in 1969, Al says he was shot down in Vietnam two years earlier, in 1967, taken prisoner and not freed until 1973. The Apollo 8 mission flew in Dec. 1968, meaning Al would have been a POW at the time. Also, NASA astronauts aren't generally sent to serve as pilots in active war zones.
Double Identity - November 8, 1965 - S1-E6
Revealing mistake: Sam's reflection character turns around too slowly in the mirror at the beginning of the episode.
The Color of Truth - August 8, 1955 - S1-E7
Visible crew/equipment: The shadow of the camera is visible on the car's hood when Al is trying to convince Mrs. Melanie not to go after Sam. It lingers there for a while in the shot.
Double Identity - November 8, 1965 - S1-E6
Factual error: The episode takes place November 9, 1965. After the haircut incident they are seen moving away from a theater with Doctor Zhivago on the marquee, but the movie was released December 22, 1965, a month and a half after the scene is supposed to take place. (00:28:00)
Chosen answer: Per the Quantum leap page at http://www.scifi.com/quantum/episodes/season5.html. 8 August 1953: An enigmatic leap lands Sam in a Pennsylvania tavern, as his own grown self on the day of his birth. As Al and Gushie work frantically to locate him, Sam befriends a wise bartender (popular character actor McGill, who'd appeared in a different role in the very first "leap") and a group of coal miners. As a host of familiar-looking faces pass through the bar - with different identities than Sam remembers - Sam ponders his life of leaping with Al the bartender, who tells Sam he controls his own destiny. Pressed for more, Al the bartender simply shrugs and says, "Sometimes, 'that's the way it is' is the best explanation." Sam realizes he must right at least one more wrong before he can go home, and leaps back to tell Al Calvavicci's wife Beth (from "M.I.A.") to wait for Al, who will survive Vietnam and come home to her. The closing title cards state that Beth and Al have four daughters and will shortly celebrate their 39th wedding anniversary ... and that Sam Beckett never returned home.
Boobra