This episode is titled "Buffalo Man" on Comcast TVLDW (TV Land). There was, however, an episode with the correct title of "Buffalo Man" in season 3.
The Indian,Tahrohon, is probably about 18-20 years old, based on the backstory of Noah finding him 10 years ago when he was a kid, and Festus' comment about getting him some sarsaparilla the next time he's in town, implying that he's too young to drink. The actor playing him, Dan Ferrone was 30 years old at the time.
Michael Constantine outlived everyone else in this episode; passing in 2021 at the age of 94. Bret Madrid lived a longer life (99), but passed years before Constantine.
This installment featured actor Lane Bradford, and the previous one featured actress Lane Bradbury.