Originally Posted by stevie667

It's an interesting paradox, but i'll try and explain myself.

Lets start off in the 'past' so we can go through the timeline.

Borg sphere found on earth, borg assimilate a few people, and send off subspace message to delta quadrant. It's stated that this will take a few hundred years to get there, and has the co-ordinates to earth.

Several hundred years in the future a borg ship is on the way to earth, and assimiltes picard. This is the first time we see the borg on the way to earth. It's here that the message is meant to tie in, the borg get it and decide to come chew over earth. Naturally they get defeated, and everythings ok, minus some 40,000 Starfleet personel.

Several years after that, the borg send another cube to earth, which is what happens in first contact. The borg are aware that by stopping earth developing warp travel, they can assimilate them (or something along those lines). The borg sphere we see here is shot down and crashes on earth (which is found in the enterprise episode), and the TNG crew saves the day.

Now we go back to step one, enterprise discovers the borg sphere remains, and a message gets sent off to the delta quadrant. The cycle starts over again.



Time travel makes my head hurt.