Continuity mistake: In the Ponderosa home, Arturo Diaz, a Mexican freedom fighter, is shot by a renegade pistolero. Diaz falls on his back and Ben Cartwright rushes to his side. Diaz says "Adios" and then dies, with his head turned to the left. After a brief close-up of Ben, Diaz's head is now turned to the right.
Bonanza (1959)
1 mistake in The Deadly Ones - chronological order
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?