Catch up on the saga so far...A cheat's guide to Orphan Black to get you up to speed ahead of the release of series 3 on BBC iPlayer.

Sci-fi drama series. More revelations about the ruthless Castor clones unsettle Sarah, though Seth manifests an intriguing genetic 'glitch'. Show more

Sci-fi drama series. Captive in the Castor compound, Helena prepares her escape. Cosima dares to go on a date. Show more

Drama. Sarah, Mrs S and Felix return to London seeking the 'Castor original' man with deadly intent. Helena has a violent answer to a family threat. Show more

The war with Dyad is all but lost when Rachel's latest ploy forces a broken Sarah to concede. The Clone Club springs into action. Show more

Sci-fi drama series. With nowhere to turn Sarah must continue posing as Beth, and with a killer pursuing her she must find another apparent identical named Alison. Show more

Sci-fi. After learning she's a clone, Sarah's intention is to get the money and leave, but everything changes when the body is found and Beth gets the case. Show more

Sci-fi drama series. Sarah realises that the survival of the Orphans will take more than police work. Her reunion with Kira is in jeopardy. Show more

Sci-fi drama series. Sarah is suspicious of Paul when evidence suggests the Orphans are part of an ongoing experiment. Allison's paranoia becomes a problem. Show more

Sci-fi drama series. Sarah has to decide who to entrust with her secret after the separate worlds of Sarah, Alison and Beth collide. Show more

Sci-fi drama series. Paul goes missing, which compels Sarah to tackle the conspiracy herself. Cosima is drawn closer to Delphine and Dr Leekie. Show more

Sci-fi drama series. The Orphans are pitted against each other as Sarah plans what to do next. Paul does his best to conceal Sarah's existence. Show more

Sci-fi drama series. Dr Leekie gives Sarah pause for thought about seeking revenge, and Cosima must choose sides when she realises the truth about Delphine. Show more

Sci-fi drama. Art's intervention ruins Sarah's chance to bring Helena back to sanity. The Orphans decide whether to form an alliance with the creators. Show more

Sci-fi drama series. Sarah is out of options, on the run, pursued by deadly adversaries and desperate to find her daughter Kira. Show more

Sci-fi drama series. Sarah enlists Art's help to find Kira and is shocked when she learns where the trail leads. Show more

Sci-fi drama series. After hitting the road with Felix, Sarah is forced to turn to an old flame from her past, but their brief respite is brutally shattered. Show more

Sci-fi drama series. With Cosima's help, Sarah digs into the origins of the clone experiment. The hunt takes her right into the belly of the beast. Show more

Rachel goes on the warpath and lashes out at Sarah's loved ones. While Sarah tries to keep them safe, an unexpected visitor threatens to derail her plans.

Sci-fi drama series. Sarah joins forces with an unlikely ally when she follows clues that she hopes will lead her to the origins of the experiment. Show more