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I would think that after the Enterprise E traveled "back to the future" and repaired the timeline, neither Cochrane or Sloane would remember the Enterprise's involvement in achieving first contact. Is that right? Because otherwise doesn't that totally screw up the timeline?

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Why wouldn't they remember it? The attack took place, and nothing altering the timeline actually occurred; the Phoenix achieved warp speed at the required time, the Vulcans came to Earth, Cochrane and Sloane made contact, etc.. There is no particular reason for the Enterprise-E crew to even suspect that they were not meant to intervene, time-travel being what it is. There was absolutely no reason why Sloane and Cochrane would not remember the events of First Contact. – James Sheridan Jul 26 '14 at 1:12
up vote 11 down vote accepted

In ENT 2x23, Regeneration, it was confirmed that Zefram Cochrane does indeed remember the events of the movie:

It is a speech that was given 89 years prior by Human history's inventor of warp drive, Dr. Zefram Cochrane. In it he had spoken about the events surrounding his first warp flight. He had spoken of a group of cybernetic creatures from the future who had intended to "enslave the Human race". They had tried to prevent the flight, but were stopped by a group of Humans, also from the future.

Since he remembers it, it's pretty likely that Lily Sloane does as well.

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And does the Enterprise crew remember the event as well when they travel back into the future? – Lukas Jul 26 '14 at 1:20
@Lukas Why wouldn't they? They did nothing to erase their own memory... – Izkata Jul 26 '14 at 1:22
@Lukas: They don't keep it a secret. They file a report on it, as everyone in the military would. – James Sheridan Jul 26 '14 at 2:11
That was worded badly, I meant they as in Starfleet Command. Meaning that it probably wouldn't be an occurrence that everyone would be aware of – Lukas Jul 26 '14 at 4:49
The events of First Contact took place after Voyager became lost in the Delta Quadrant. The crew cannot, therefore, have any knowledge of those events, outside of Seven of Nine, until they re-establish contact with the Federation. – James Sheridan Jul 27 '14 at 6:37

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