Continuity mistake: Adam and Joe are restraining Hoss while Ben gives him a ladleful of a thick white tonic for "spring fever." Joe has his right arm around Hoss' neck and is holding Hoss' mouth open with his left hand. As Hoss takes the tonic, a glob of it spills onto his left cheek. In the immediate close-up, the glob has vanished.
Bonanza (1959)
1 mistake in The Pure Truth
Starring: Lorne Greene, Michael Landon, Pernell Roberts, Dan Blocker
Adam Cartwright: Let's go back to the Ponderosa, Pa. This isn't any of our affair.
Ben Cartwright: We can't ignore the rest of the world. We're the only stabilizing influence in the country.
Mrs. Wharton and the Lesser Breeds - S10-E17
Trivia: A portion of the background music used during an outdoor scene in the town of Vallejo was later used as the theme song for "Little House On The Prairie."
Question: How could one of the three have been in prison during the murder at the barbershop? Did he have a twin?