After a season spent with clones of both genders and bullet-ridden history on either side, Orphan Black’s third year will complete its next DNA sequence this Saturday with Season 3 finale “History Yet to Be Written.” The BBC-A has released the full set of photos from Saturday’s finale, but will the Castors cash out their original maker, expose yet another layer of conspiracy?

Castor clones have dropped like flies all season, but that may change if Rudy or Dr. Coady manage to get their hands on Kendall Malone, original genetic source to both Castor and Leda, and not-so-coincidentally Mrs. S’ own mother. Our first photos from the hour see Sarah and co. dealing more with the enigmatic Topside operative Ferdinand (James Frain), while Alison continues her campaign, and Rachel awakens in unfamiliar surroundings.

So reads the official synopsis:

As Clone Club races towards the truth, Castor and Topside force Sarah to make uneasy alliances. But there is some rest for the wicked, when Donnie gives Helena an unexpected ‘gift’, and the results of Alison’s candidacy finally come in. Even as team Leda takes a moment to breathe, change is afoot and a life hangs in the balance.

Intriguingly, Cosima remains nowhere to be found, which could well spell a dire end that fans have been dreading all season, or perhaps a simple oversight. Plenty of surprises remain in store, but in the meantime, take a look at the full photo set from “History Yet to Be Written” above, as well as the latest trailer below, and prepare for Orphan Black Season 3 to bid farewell this coming Saturday.