The only way to go forward is to go back. And to do just that, we asked you to tell us which episodes are MUST SEE get ready for another trip withOrphan Black. Watch along at BBC America where the ENTIRE SERIES is available to revisit as we kick of the launch of The Next Chapter. And if we missed any of your favorites, let us know in the comments!Bonus: for a limited time, watch he first episode of the series here from our friends at BBC America:[embed<iframe width="1024" height="512" src="https://www.youtube.com/embed/9GFFZc0mqrA" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>[/embed]

S1, Ep 7, "Parts Developed in an Unusual Manner"

With Paul missing, Sarah is forced to confront the conspiracy head on. But when Paul learns Sarah has kept essential information from him, the fragile trust between them threatens to shatter. Meanwhile, Cosima grows closer to Delphine and the dangerously fascinating Dr. Leekie.

S2, Ep 6, "To Hound Nature In Her Wanderings"

Sarah joins forces with an unlikely and untrustworthy ally, following a trail of clues that she hopes will lead her to the origins of the clone experiment. Cosima and Delphine make a discovery that could prove to be the key to treating her illness. Alison finds herself in unsavory company at rehab.

S3, Ep 1, "The Weight of this Combination"

Sarah pursues the missing Helena who is held in a faraway compound. Sarah must use her wiles —and acting chops — to deter a Topside investigator who threatens the Leda sisters’ lives. Meanwhile, Cosima appears to be rebounding from her illness, while Alison and Donnie face newfound financial woes. But when the menace of Castor rears its head once more, Sarah and her entire family must come together to survive.

S3, Ep 7, "Community of Dreadful Fear and Hate"

Alison must secure a store front in order to take her and Donnie’s business to the “next level.” But things don’t go according to plan when her mother, Connie, proves to be a major hindrance. Cosima is facing familiar health issues and calls upon beleaguered Alison for a favor. But with Alison working to save an imperiled Donnie from the merciless hands of a drug lord, it’s Cosima who ends up doing a favor. An unassuming Scott gets closer to the greatest discovery of all, when he sits down with beleaguered clone Rachel.

S4, Ep 5, "Human Raw Material"

Sarah’s day off to reconnect with Kira quickly turns into a sleuthing mission aimed squarely at discrediting Felix’s new ties. Cosima steps up with Donnie to further investigate the Neolutionist fertility research center. While Donnie bumps into an all-too-familiar face, Cosima makes a shocking discovery that leads her into a dangerous encounter.

S4, Ep 9, "The Mitigation of Competition"

With Susan Duncan deposed, Sarah finds herself in the same position as Rachel — under the heel of a new HBIC — causing the archenemies to come together for the greater good. Cosima and Susan butt heads on the ethical implications of human experiments. Meanwhile, when the Hendrixes' legal counsel, Adele, further investigates Donnie’s case, she begins to suspect Felix is keeping deep secrets. Helena’s arrival forces Felix to make a difficult decision.

S5, Ep 5, "Ease for Idle Millionaires"

While Sarah and Kira spend some well-needed bonding time at home, secrets are unlocked about Kira’s special gifts that are surprisingly linked to the island’s creature. Meanwhile, Cosima joins Delphine at the mansion for a twisted family dinner, causing a dangerous showdown with the Neolution patriarch.

S5, Ep 8, "Guillotines Decide"

Mrs. S orders the sisters to take a night off from sleuthing to celebrate Felix's art opening. But while Felix attempts to impress a famous gallerist with the help of his sestras, Sarah remains on edge with a niggling suspicion that S is hiding something. Meanwhile, wounded and desperate, Rachel reunites with an old ally, but their plans for revenge on Neolution put Clone Club in the line of fire.

S5, Ep 10, "To Right The Wrongs of Many"

With Helena forced to take shelter behind enemy lines, it’s a bloody last stand for survival as Sarah and Art struggle to protect her, and end the siege on the sestras once and for all.