All ten episodes from the third series of the canadianus sci fi drama starring tatiana maslany as identical women who are revealed to be clones in this series sarah maslany tries to track down her missing twin helena also maslany with the castor clones in hot pursuit of the leda sisters meanwhile the proletheans continue their pursuit of all clones and sarah tries to find out more about the origins of project castor the episodes are the weight of this combination transitory sacr