When Calls the Heart Sets Premiere Date for Supersized Season 8 TVLine 17/12/2020 The cable network has announced that When Calls the Heart Season 8 will premiere on Sunday, Feb. 21, at 9/8c. What’s more, Hallmark has ordered two additional episodes, expanding this season’s count to 12 episodes — the most since Season 1. (Subsequent seasons ran anywhere from seven to 10 episodes a piece.) More from TVLine Viewers will get their first taste of Season 8 when Hallmark re-airs the 2019 Christmas movie, When Calls the Heart: Home for Christmas, on Friday, Dec. 25. In addition, Season 7 will be available to stream on the Hallmark Movies Now subscription service, beginning Dec. 26.