Factual error: About half-way through the show, Joe Cartwright states 47 people received The Medal of Honor in the Civil War. In reality there were 1522 recipients of The Medal in the Civil War. While an honor to receive, it wasn't held to quite the same level as in WWI and beyond.
Bonanza (1959)
1 factual error in season 11
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?