Is it possible that Daniel Lissing, former star of When Calls the Heart, will return as Jack in Season 10? Watch this video to learn more. Lissing, who played the male lead Jack Thornton from 2014 to 2018, left the popular Hallmark Channel drama after his character was k!lled off in season 5, leaving many fans heartbroken. Although some fans hope for his return, Lissing recently revealed to costar Paul Greene that he has no regrets about his decision to leave the show. #WCTH #DanielLissing #JackThornton