‘When Calls the Heart’s Kevin McGarry jokes to ET’s Deidre Behar that he nearly pranked Erin Krakow before Nathan and Elizabeth’s first kiss. The co-stars reflect on bringing their characters’ first kiss to life, and Erin reveals she collaborated with the writers on Elizabeth’s love confession to Nathan. Plus, the actors share theories on how they think Elizabeth and Nathan will move forward with their new relationship, and tease what fans can expect from season 12. ‘WCTH’ airs Sundays on Hallmark Channel.