Other mistake: When Erin leaves The House to go with Ashley Jr., Elizabeth states to the kid that it's 3 a.m. When Ashley stops The Car to propose to Erin moments later, it is sunrise between the trees or early daylight, meaning this was a moment shot in different increments.
The Waltons (1972)
1 mistake in The Lost Sheep
Starring: Eric Scott, Jon Walmsley, Judy Norton, Mary Beth McDonough
Olivia: Now I've got two sons working nights in a saloon.
Trivia: While John is reading the newspaper funnies to John Curtis, we hear Erin and Mary Ellen come home, so John puts the folded newspaper down on the couch. And as the newspaper lies on the couch, we can see the large white adhesive label with typewritten sentences adhered to the center of the funnies page. Presumably, these are the actor's lines as he was reading quite animatedly to the toddler (sweet moment). (00:06:25)