Camping stars Jennifer Garner and David Tennant as Kathryn and Walt, a not-so-happily married couple. A meticulously planned outdoor trip to celebrate Walt’s 45th birthday is derailed by uninvited guests and forces of nature, turning the weekend into a test of marriage and friendships. From executive producers Lena Dunham and Jenni Konner, starring Jennifer Garner and David Tennant, Camping premieres Oct. 14 on HBO.