George, Sr. hires a new attorney who asks the Bluths to participate in a mock trial to help prepare them for the real thing. The attorney gets actor Judge Reinhold to preside over the mock case. Meanwhile, Buster fakes a coma to get out of testifying, and George Michael and Maeby participate in a mock wedding to entertain hospital patients. Back at the office, Michael discovers that he may have a long-lost sister named Nellie Bluth.