S7, E14: The Major Crimes Division investigates a hit-and-run murder of a young girl on a bicycle, and the LAPD's police commissioner (guest star MARK MOSES – Desperate Housewives, Mad Men) and his wife, Gail (guest star ELIZABETH PERKINS – Weeds), may be in trouble when Brenda becomes determined to uncover a scandal one of them tried to cover up. MAGGIE WHEELER (Friends) guest stars as Gail's friend who clashes with Brenda.