When Seth tries to choose between dating Summer (recurring guest star Rachel Bilson) or Anna (recurring guest star Samaire Armstrong), he ends up in the middle of a very complicated situation. Meanwhile, Ryan visits his brother, Trey (recurring guest star Bradley Stryker), in prison, accompanied by Marissa. When Julie (recurring guest star Melinda Clarke) finds out that Marissa is with Ryan in Chino, she becomes furious. As everyone nervously waits at the Cohen house for Ryan and Marissa to return, tensions mount, making the holiday a Thanksgiving to remember.