"Heartland" Season 18 will premiere — up north, at least — on Sunday, Sept. 29 on CBC Gem (and then Sunday, October 6 on CBC TV).

Stateside, Season 17 has been streaming since April 25, on UP Faith & Family.

https://tvline.com/news/timothy-olyphant-cast-owen-wilson-apple-tv-plus-golf-comedy-series-1235321469/