That tease, combined with promotional footage and past interviews with Milo Ventimiglia, confirmed that Jack’s time in Vietnam will be covered in Season 3, with the meat and potatoes of the storyline centering around how Jack lost his brother and fellow squad member, Nicky.
Justin Hartley would know about Jack’s impact on This Is Us Season 3 better than most, since the Season 2 finale teased the father and son’s stories will intertwine.
Kevin was last seen on a plane headed to Vietnam and clutching a picture taken during his father’s war days.
One would imagine Jack’s story will strongly center on that time in his life, with many heart-wrenching moments that will make tissue sales skyrocket nation-wide.