Terminator Genisys: 10 Questions It Failed To Answer
7. Why Was The T-800 In 1973?
As already mentioned, 1973 is when the Terminators first started showing up in the life of Sarah Connor, one killing her parents while the good Terminator arrives to protect her and make sure she lives to see the future, so she can give birth to John Connor, save humanity, and all that jazz.
If you put aside the fact that this is way earlier than the Terminator has appeared so far, in terms of when hes sent back in the first two movies, and accept the alternate timelines that are in play here, theres still one question left hanging.
Who sent the T-800 back to 73 from the future in order to save Sarah? In that timeline John Connor has been turned, and a part of the Skynet plot, which makes it all rather messy.