A Portrait for Troian - February 7, 1971 - S2-E11
Factual error: When the second earthquake happens, certainly we would see evidence of the water shaking but the water is calm. In a real earthquake, the water would be sloshing around.
A Portrait for Troian - February 7, 1971 - S2-E11
Audio problem: Near the beginning in the tomb, a woman says "he's been dead for three years." Her mouth doesn't match what she is saying.
A Portrait for Troian - February 7, 1971 - S2-E11
Revealing mistake: When the recovered drowning victims are lying on the ground, Troian's supposedly dead husband moves his feet. (00:39:25)
A Portrait for Troian - February 7, 1971 - S2-E11
Continuity mistake: When she's confronting her brother on the dock, Troian's long hair shifts from being completely behind her back to falling over her shoulders in front with each change of camera angle. (00:35:00)
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