This Is Us Season 3 will "spend a lot of time in Vietnam to dive into Jack's history"

Indiewire

Co-showrunner Isaac Aptaker discussed how hiring The Things They Carried author and Vietnam veteran Tim O’Brien as a consultant will affect Season 3. “We’ve hired Tim O’Brien, one of the premier novelists and a veteran himself, to come consult in our writers’ room — because many of us weren’t actually alive during Vietnam,” he said. “We wanted that authority there to really get the story right. He’s been wonderful. He spent a week with us and just shared so much of his experience. Going back to how our show is best when it comes from someone’s life story, we took so much from Tim and his life. He’s actually co-writing, with (series creator) Dan Fogelman, an early episode that really dives into Jack’s history there.” ALSO: Season 3 to delve into Beth and Toby's pasts.