Currently in production on its second season, Hallmark Channel announced last night during its Winter TCA Press Tour event that “General Hospital’s” Jack Wagner (ex-Frisco Jones) and Kristina Wagner (Felicia Jones) will join the cast as regulars in its original series “When Calls the Heart,” set in a 19th century mining town and starring Lori Loughlin (“Full House,” “Summerland”), Erin Krakow and Daniel Lissing.