After a police officer and other authority figures are found stabbed in the backs, Rachel centers her investigation on a young woman, Pamela (guest star Marcia Cross), who is reported to have assumed multiple identities which probably spring from memories of early child abuse. But Rachel faces an even greater personal threat from an FBI honcho (guest star Gregory Itzin) who has falsely accused her of forcing a sexual relationship of a subordinate -- a charge that could ruin her career. Elsewhere, Bailey confronts George over his reliance on prescription drugs and orders him to get help.