The Walker family pulls together for better or worse when Justin reaches a critical new low point with his addiction, while Kitty and Robert move toward their future together with a renewed perspective. Guest starring are Emily Rose as Lena Branigan, Denis O'Hare as Travis March, Martha Boles as Melanie, Mark Daniel Cade as Dr. James Kendall, Justine Dorsey as Sophie McCallister, Eric Gavika as the drug dealer, Ned Bellamy as Cutler Weeks and Jason Kim as Phil. "36 Hours" was written by David Marshall Grant and Molly Newman and directed by David Paymer.