First rule of Clone Club: Always have your sisters' backs.

In the first trailer for the fifth and final season of BBC America's "Orphan Black," the clones show solidarity as they prepare for the fight of their lives.

"From the very start, they hunted us ... controlled us ... used us ... betrayed us," Sarah, Alison, Helena, and Cosima (Tatiana Maslany) say in turn. "But they could not break us."

And now, they are ready to do battle against fellow clone Rachel and the Neolution movement.

Season 5 will finally reveal the origins of the clones, as Sarah races to regain control after Rachel stole the clone's DNA.

The official synopsis reads. "The walls close in on Sarah when nearly all her sestras and their allies are brought to heel by Rachel. Even more harrowing is that her daughter Kira has joined them. With the threat of Neolution having carte blanche access to clone biology, Sarah is desperate to gain control, but realizes she must change tactics to pursue a long game. Protecting both her families, and the host of clones she's yet to meet, Sarah and those still fighting the fight will uncover the missing pieces of the insidious conspiracy — and finally learn the story behind their origin. Despite the great risk, the fight of her life will either set her and her sestras free, or see them meet their end."

"Orphan Black" premieres June 10 on BBC America.

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