I don't think I rated any of the episodes above 8, but the whole package deserves an almost perfect score of 9 for me. Shows the pain we inflicted upon the native residents of 'our' countries*, without shoving inherited guilt in our faces. Made by and with natives who experienced the events depicted.
* (I say 'we/our' as many of the comments feel this is just about Canada - when we Americans did worse in almost every respect). As an evangelical Christian, I understand and support missionary activity. However, this could have (and nowadays is) done without force. Natives have much more respect for the Earth and we could certainly learn from that, among other things.