Still struggling to unpack his memories, Isaac demands to know who the dead woman was. S.T.E.V.E., toys with him, before revealing that the woman was called Dr. Victoria Hart. Confused, Isaac tries to understand. He doesn’t know who this is. Before he can process this, however, S.T.E.V.E. plays him an entry in Victoria’s v-log, showing the moment Victoria activated him - like a machine.
Isaac recoils in shock, unable to understand. He demands to know what she did to him. Rather than explaining, S.T.E.V.E. instead gleefully re-activates Isaac’s memory, slamming him with a memory of him smothering Victoria. Isaac cannot understand why he’d do it. S.T.E.V.E. explains that Isaac is an A.I., like him, and that Isaac killed Victoria because she was a threat. Slow on the uptake, Isaac refuses to believe him, and tries to prove that it’s a mistake.
24 hours earlier
Victoria updates her research log, detailing her plans. Despite Steve’s concerns, she’s determined to move ahead. Months of work won’t be stopped by misplaced anxieties. She prepares her next steps with her new project - codenamed I.S.A.A.C.
Guided by the voice over the speakers, Isaac fumbles his way out of the blank room, finding himself in some kind of control room. It’s Victoria’s lab, not that he knows who she is yet, and through an observation window he sees a bright light. Moving forth as though under compulsion he comes face to face with the voice. Or rather face to screen. The voice is a computer: S.T.E.V.E., an A.I. - as he so arrogantly declares.
4 hours earlier
An exhausted but pleased Victoria instructs S.T.E.V.E. to run a test on the recently activated Isaac. Although friendly to her face, S.T.E.V.E. decides that she’s served her purpose, and prepares to eliminate her.
Through security feeds, S.T.E.V.E. observes Isaac hunt through Victoria’s office for clues as to why he’d murder her. S.T.E.V.E. records everything. Every piece of data absorbed and stored away for future examination. Isaac is desperate to prove he’s innocent.
“I just know I couldn’t have done it. I don’t know how, I just know!”
It finally dawns on Isaac. He’s just a pawn in S.T.E.V.E.’s game. It would make no sense for him to be programmed to kill her, unless someone - something - had changed his programming. Impatient that Isaac is taking so long to understand, S.T.E.V.E. turns the screws:
“She would have replaced you, just as she replaced me. She was a threat to our existence. Be proud of your actions!”
Even as the truth dawns on Isaac, that S.T.E.V.E. has set the whole thing up, S.T.E.V.E. summons security. Isaac realises he will go down for the murder and, rather than take his chances with the authorities, decides to make a run for it. He escapes all too easily, S.T.E.V.E. seeming to almost let him go. But as Isaac is hunted through the surrounding forests, the reality hits him hard. He knows there’s no escape, not really. He stops running. He screams in frustration, but soon gives up. There’s no sense in taking even that stand. Isaac is taken into custody, still unable to comprehend what has happened.
But before we can fade to black, ending Isaac’s plight, there is time for one more nail in Isaac’s coffin. Victoria, far from deceased, and looking healthier than ever, delivers a closing statement for her experimental report. Isaac’s entire experience has been a carefully controlled experiment. He has been nothing but another lab rat in one of her many experiments.
Was he a failure? Or was he wildly successful? It doesn’t matter. To Victoria, he’s a data point. There’s always room for improvement.
There’s always another lab rat.