Cosima (Tatiana Maslany) and Delphine (Evelyne Brochu) in Orphan Black Season 2. More

The clones of "Orphan Black" may look alike, but they certainly don't love alike.

Their DNA may be the same, but Sarah, Alison, Cosima, Helena, and Rachel have shown that their hearts yearn for very different things. And this most recent episode proves just how unique each clone is, with the introduction of transgender Tony. He and Felix immediately sparked, so we have an all-new couple to 'ship!

We ranked the clone couples to date, from the pair with the least amount of chemistry to the duo that generates the most fireworks.

9. Sarah and Vic

Sarah (Tatiana Maslany) and Vic (Michael Mando) in BBC America's Orphan Black Season 1. More

What did Sarah ever see in the skeezy, hustling drug peddler? They didn't even seem to have much chemistry, and he was abusive to boot. Now he's still hanging around to torture Alison. Boo, Vic, boo.

8. Rachel and Paul

Orphan Black, Season 2, Episode 7, Rachel (Tatiana Maslany) and Paul (Dylan Bruce) More

Icy, strait-laced, all-business Rachel occupies two of the bottom three rankings, poor thing. As sexy as she looks in her stilettos and pencil skirts, she's just too scary to generate any passion with Paul.

7. Rachel and Daniel