A war between two factions of clones is brewing in the new trailer for Season 3 of Orphan Black. We reported last month that the Season 3 Premiere will debut not only on BBC America, but also on all AMC Networks (AMC, IFC, SundanceTV and WE tv) simultaneously in more than 170 countries around the world on Saturday, April 18. Starring SAG and Golden Globe nominee Tatiana Maslany in multiple roles, Orphan Black's second season brought new enemies to light, culminating in a shocking finale which revealed a new line of male clones, played by Ari Millen. Season 3 plunges the clone sisterhood into unexpected territory with the realization that they're not alone.

No sooner has Sarah caught her breath after a stealthy escape from DYAD and the ruthless clone Rachel (Maslany), she is called upon to face the crazed, captive Castor clone, Rudy (Millen). But it is the discovery of Helena's disappearance that spurs Sarah into action, rallying her sisters in the quest to reunite their clone family, and find peace once and for all. Their greatest threat is a band of highly trained soldiers - identical brothers dubbed Project Castor. Unlike the sisterhood, Mark, Rudy, Seth, Miller and others grew up together, fully aware of who and what they are.

Developed by the military, this wolf pack was raised as regimented clones - singular in thought, movement and allegiance. Hell-bent on kicking up dirt, they're dispatched to tackle their mission from all sides. But differences in approach betray cracks in their armor, and may be the very thing the sisters need to escape their clutches. The sisters will need all the help they can get. With Cosima's fluctuating health and no known cure for the mystery illness that ails her, she is holding onto life by a thread while nursing a broken heart left by her scientist lover Delphine (Evelyne Brochu). Can she find a cure in time to save herself and her sisters? Take a look at the latest footage before Orphan Black returns next month.