Lonesome Dove (1989)
1 question in season 1
Starring: Robert Duvall, Tommy Lee Jones, Danny Glover, Diane Lane, Anjelica Huston
Revealing mistake: When they arrived at Montana, the Captain said that this is where we will stop and build a ranch. There are two straight depressions in the ground converging together that would not have been there since this was virgin land.
Woodrow Call: I guess it's our fault we should've shot sooner.
Gus McCrae: I don't want to start thinking Woodrow of all the things we should have done for this good man.
Answer: They didn't have antibiotics to prevent infections from setting in. No sterilized equipment. No clean rooms to work in. Everything was dirty.