Clone Wars: Orphan Black S02E07 Knowledge of Causes, and Secret Motion of Things

Dr. Aldous Leekie is dead, killed by of all people, Donny Hendrix after Donny learns he's been lied to from the beginning. Now what? Ethan Duncan is in play and being guided by Mrs. S as they presumably bring the missing clone science to Cosima and Delphine so they can figure out why the clone are getting sick and find a cure. Is Kira the key? What will Donny and Paul do now? What will Rachel do now that she knows her father's alive and Leekie murdered her mother?