There are Numerous Fights through out the Series with Various Degrees.
Set in the American west, so there are occasions of guns being used in hunting situations and sometimes in defense.
A few gunshots where blood is shown on clothing.
Some situations of prejudice which involve a Native American getting shot.
An episode when a character gets a severely infected leg may be a little tough for some people.
An episode covers a plague of typhus. This contains some moderate gore.
One episode contains a sexual assault. nothing is actually shown, but the lead up is filmed like an 1980s horror movie. The assaulter is wearing a harlequin mask and is quite creepy. There are several stalking-like moments in this episode too.