WARNING: If you don't want to know what happened in this episode, don't read this photo recap!
It's the last day of the Blood Drive! Sort of! More like the season finale of the show within the show. Grace and Arthur bond and get SUPER couple-y as Grace tells Arthur about the time she killed a dog that bit her sister, Karma. Pulling into the show, they're excited because Slink has them doing this one last favor.
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The final test for the Blood Drive contestants is a fight to the death in a sort of cage match called The Battle Dome. And this guy, the Heart Industries bigwig, shows up to say the finale will be shown in the closed circuit cameras and the Blood Drive is being shut down. Again.
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Domi and Cliff! Now that they've worked out their issues on the road, they really do wonder if they'll ever be satisfied after the Blood Drive is over. We feel the same, actually.
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Arthur is called into the Battle Dome and tells Grace that no matter what happens next, he doesn't care what Heart has in store for him, he won't ever kill again.
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Having left Aki on the side of the road, Christopher blasts toward the Battle Dome, but realizes he can't do it without her, so he heroically turns around and heads back to get her. They're going to get rid of her proximity sensor so they can run off together for good.
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Arthur finds himself in the Battle Dome, but has vowed not to kill anyone. That's the whole point of the Dome: battle to the death. He is attacked by everyone. And he holds fast, even giving an impassioned speech and telling the assembled crowd that they're all under arrest.
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The Head of Heart Industries tells Arthur that they need him to kill people. For ratings, presumably. This horrible dude has Grace captured and is using her as bait so that Arthur will do what Heart Industries wishes. Then he starts to take his clothes off…
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And then this happens. The Head of Heart Industries takes off his SKIN! And inside? Is Grace's sister Karma! This was all a ruse! It turns out Karma's been behind all of this the whole time!
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Seems that Karma snapped pretty hard when Grace left her for dead. And this has all been a revenge plot. It's going according to her plan until Slink confronts her, frees Grace, and kicks Karma into the Battle Dome.
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Meanwhile, Domi and Cliff are in the Dome. And knowing they can never win the Blood Drive, they kill each other. End of the road for them; but this is sort of how it had to end, no?
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And then, the unthinkable. As Grace realizes her sister has snapped permanently and must be dealt with - the two fight hard. The result is Grace FALLING INTO THE CAR! Is she dead!? (Turns out, no. Not a spoiler, someone else fell into the car, but…) Arthur THINKS he's witnessed Grace's death!
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Back at Heart Industries, as Aki and Christopher try to disable her tracking chip, they find another terrifying Heart Project. Something called the Soul Reclamator. What does that do?
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Thinking he has nothing left to live for, Arthur snaps into crazy murdering killer mode and kills all of the Battle Dome people that come his way.
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After some monologuing and sadness, Grace and Karma have one last epic battle. Grace gets the advantage, and pushes her entire raison d'etre into the car. Make no mistake, this time, gang. Karma. Is. Dead.
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Wait. Hold on. No she isn't. That's what the Soul Reclamator does. Brings you back to life in the basement of Heart Industries.
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Arthur has snapped, everyone. Bad. Knowing they won't be able to kill each other, and that there can be only one Primo, Grace forfeits the game. Arthur has won the Blood Drive! He's the new Primo!
