Other mistake: Charles can barely get up from his bed because of broken ribs, and it's totally impossible to breathe well, let alone moving sacks of grain. But in the end when the neighbors help with the sacks he's walking OK, as if he hadn't just fallen down from the top of the pile of sacks with broken ribs.
Little House on the Prairie (1974)
1 other mistake in Harvest Of Friends - chronological order
Welcome To Olesonville - S9-E3
Continuity mistake: Mrs Olsen cleans up the old Hansen house to sell, however it was made the blind school years back and burned down, killing Mary's baby and Alice Garvey.
Laura: I hate that Nellie Oleson.
Caroline: Laura! Don't say "hate" - don't even think "hate"! I'm sure Nellie has her good qualities somewhere.
Charles: Your ma's right, half-pint. Now on the way home, we'll try and think of some.
The Voice of Tinker Jones - S1-E11
Trivia: Sean Penn is in this episode, albeit with no lines, always wearing the same blue shirt. His father directed this episode.