Revealing mistake: When Maryellen runs into John-Boy's arms (after running away) Richard Thomas (John-Boy) breaks character as he looks into Judy's (Maryellen) eyes, by swallowing hard. Like a guy would do, when he's close to an attractive girl. Then later covers his groin with the cast, when John and the kids check up on him. The two young actors playing Jon-boy and Maryellen crushed on each other behind the scenes.
The Waltons (1972)
1 revealing mistake in The Minstrel
Starring: Eric Scott, Jon Walmsley, Judy Norton, Mary Beth McDonough
Factual error: When Elizabeth asks Zeb how Vanessa can be happy, Zeb has his old catalog with a bunch of flower seed packets on his lap, and as they both hold up the packets, particularly Elizabeth, the modern Universal Product Codes are at the back of the packets. The UPC did not exist until many years later. (00:10:05)
Olivia: Now I've got two sons working nights in a saloon.
The Journey - S2-E1
Trivia: While Maggie MacKenzie and John-Boy are at the Mermaid Restaurant, when they both dance together Maggie envisions her long deceased husband, Michael MacKenzie, dancing with her instead of John-Boy. It is Earl Hamner Jr. who portrays Michael MacKenzie in this uncredited onscreen cameo during the scene (note teeth and facial features are identical).