Quick recap
1998, Guatemala. Three years after destroying Cyberdyne, Sarah and John are found by a T-800 sent before Skynet was erased, and John is killed. In 2020 Mexico City, the Rev-9 arrives from a different future to kill factory worker Dani Ramos. Grace, an augmented soldier from 2042, comes to protect her. Sarah shows up mid-fight: for years she's been getting anonymous messages, signed “For John,” about each Terminator's arrival. Grace explains that in her future Skynet never existed and the attack came from Legion. The messages lead to Texas, home of Carl, the T-800 that killed John, now with a conscience and a family. At the dam, Carl and Grace die destroying the Rev-9. Dani gets ready for the war she will lead.

