The Formula (2) - S2.E6

Ryan becomes unable to resist himself as he becomes infatuated with murder suspect Grace Devlin. He continues to assert her innocence, even as evidence stack up. Ben has no choice to suspend Walker when compromising photos of him and the accused are discovered. Ben arrests Grace Devlin, but is forced to release her when one of the governor's former aides, Gil Murphy, comes forward and admits to the slaying.