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Number 47: (hidden) Allen Korman, the man whose profile is uploaded by Tom, was born in February 1959 which makes him, at the time this episode aired, 47 years old.
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When the APO team arrives on the tanker to rescue Sydney they slowly approach the ship and land, instead of rappelling, or boarding the ship with speedboats, this made them excellent targets for any of the ship's security detail.
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The shot of Irina behind the glass is actually recycled from season 2's Trust Me, when Irina was seen in her glass cell.
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Goof: When Sidney is communicating with Langley in the ship, she has this small crash where she pauses , and then restarts talking. However, when Marshall is hearing it, the pause is really smaller than the actual one on the ship, like there was no pause at all.
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Goof: When Tom Grace uses Marshall's program to decrypt the data on his memory stick, they use the same footage to show the cracked encryption key, 132007479, as they used when the team was hacking into the hard drive stolen from Langley. It's highly unlikely that the encryption keys would be exactly the same in both cases.