Sarah joins forces with an unlikely and untrustworthy ally in hopes of finding the origins of the clone experiment.
Alison goes into free fall when a rehab confidante betrays her and threatens to expose the truth about Aynsley's death.
Harvey defends Sutter from Cahill; Mike's past threatens to derail his mission; Rachel and Jessica seek evidence to re-open a case; Louis woos Tara.
In order to protect Mike, Harvey considers putting Gallo back on the streets; Jessica and Rachel get Bailey's case reopened; Louis deals with anxiety over Tara.
Jessica and Rachel fight to save Leonard Bailey; Harvey and Louis try to keep clients from abandoning ship by wooing their oldest client.