Sully's $100 monthly salary in 1870 adjusted for inflation to 2014 would be worth $1,807.15.
Snow Bird actress Tantoo Cardinal was 44 when aired which is the same age as actress Jane Seymour when she gave birth to twins. An 1870s woman would virtually be impossible to carry a child to birth at that age while it is semi-routine twenty years after Ms. Seymour did it.
This is the last episode in which Erika Flores played Colleen Cooper. Flores quit the role due to disputes with CBS over salary. Jessica Bowman was recast as Colleen and maintained the role the rest of the series and in the movies that followed. Except for episode, 3.22 "Bone of Contention," which was filmed prior to this episode ("Indian Agent") but aired towards the end of the season.
Dr. Mike mentions snakeroot which is an old Indian herbal medicine used for snake bites, stomach ills, aches, edema, and general tonic.
Cloud Dancing is really playing the flute.