Law & Order: Criminal Intent (2001)

S04E04 Great Barrier

Goren and Eames are on the trail of a jewel thief linked to the murder of her partner. Their investigation reveals that the intricate heists are orchestrated by none other than Nicole Wallace, Goren's old adversary. As the detectives probe into the dynamics between the two women, they stumble upon a sinister scheme to eliminate Wallace's ex-husband, the key to uncovering the evidence of Wallace's initial murder.