Factual error: Walter Prescott accuses Hoss of "two-timing" him with a mail-order bride. This episode is set in the mid-1860s and, according to the Merriam-Webster dictionary, the expression "two-timing" dates from 1924.
Bonanza (1959)
1 factual error in season 4 - chronological order
Starring: Lorne Greene, Michael Landon, Pernell Roberts, Dan Blocker
Character mistake: When Hoss takes Timmy for a horseback ride, after they both dismount by the lake, Hoss calls Timmy by his real name Johnny (Whitaker) and not Timmy.
Ben Cartwright: You and your education.
Adam Cartwright: Education is progress! Now what have you got against it?
Ben Cartwright: I don't have anything against education - as long as it doesn't interfere with your thinking.
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?