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Continuity mistake: Irene's hair changes in the first scene. When arriving at Gattaca, it's a side part low hairstyle. When she's at her workstation, it's pulled straight back into a high bun. A few minutes later, when she's speaking with Vincent as they watch a rocket launch through the skylight, it's back to the initial style, a low French twist. (00:04:39 - 00:05:30)
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Continuity mistake: Irene's hair changes in her final scene. She's wearing a tighter doughnut-shaped bun at Gattaca, when she's picked up by Anton to visit Jerome's home. When they reach the house, her hair is done quite differently, in a much larger and looser bun. (01:18:11 - 01:25:19)
Chosen answer: Jerome does a little sleight of hand, switching the vials.
Greg Dwyer