'When Calls the Heart': Nathan Tells Elizabeth That Adopting Allie Is the Best Thing He's Ever Done

In ET's exclusive clip, Nathan comforts Elizabeth during an evening chat outside. The Mountie sweetly places a blanket around her shoulders to warm her up, and they proceed to have a heartfelt conversation about Allie's upcoming adoption ceremony. Nathan tells Elizabeth it's the best thing he's ever done in his life. 'When Calls the Heart' airs Sundays at 9 p.m. ET/PT on Hallmark Channel.