In the Season Four premiere, Lisa Vanderpump vows to take SUR restaurant to new heights. Scheana throws a costume party for her 30th birthday, but when Kristen shows up Ariana and Sandoval accuse Scheana of being a fake friend. James's reckless behavior threatens his DJ career, Schwartz realizes he's ready to commit to Katie, and a visit from Jax's mother offers rare insight into his life before SUR.