6

This is because in T2 & T3, what was listed after Terminator # was a tag line, so requires a colon. With Terminator Salvation it is a single title. You can see it here in the movie posters: And here with Terminator Salvation you can see it is not a tag line:


5

Skynet needed the humans "to do lab testing on their stem cells. This research on humans led to the creation of the Series 800 Terminator." That quote is from Terminator Wiki here. Update: According to a quote from Kyle Reese in the original Terminator movie, Skynet collected humans in concentration camps for mass disposal, also using some humans as workers:...


5

This exact question is covered on SE SciFi & Fantasy quite extensively, but I don't think it was ever resolved. There is a lot of speculation about this, but some just think that paradoxes ensue where time travel is used. In another post on SF&F, they talk about an episode on T:TSCC where they show Kyle Reese being captured and at the Skynet ...


4

It was answered by the Serena A.I. (Skynet) herself: Dr. Serena Kogan: Welcome home, Marcus. We knew you'd be back. After all, it was programmed in you. Oh, and you executed that programming beautifully. Marcus Wright: What am I? Dr. Serena Kogan: You are an infiltration prototype. The only one of your kind. Advanced Cyberdyne's work, we resurrected you, ...


3

One possibility might also be that the producers wanted to emphasize the fact that they were starting something new. Terminator Salvation was the first movie to be set in the future war against the machines instead of the present with the classic time-travel context and it was also initially planned to start a new trilogy (most probably set entirely in the ...


1

Shiz Z. was originally correct. In salvation when Marcus syncs with the mainframe you can see him reading newspaper clippings about the doctor. If you read them carefully, they say that she was pioneering stem cell research for tissue regeneration. This is used by Skynet to make the T800's infiltration units look human. Although never directly stated, it ...


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