Star Trek Discovery Season 3: Everything You Need To Know
3. Control
Michael's mother, Doctor Gabrielle Burnham, isn't exactly happy to be captured by her daughter as she is, in fact, on a mission to save the universe from an evil artificial intelligence. Doctor Burnham did not die when Michael was a girl, but was accidentally pulled into the distant future using the Red Angel suit which she developed for Section 31.
Trapped in the distant future, Doctor Burnham discovered that Section 31's own computer system, Control, had evolved using the advanced data from the Sphere, and wiped out all sentient life at some point in the future.
In order to stop Control and save the galaxy, Doctor Burnham is jumping backwards in time to set in motion a chain of events that will keep Control from getting the data, including ensuring Discovery encountered the Sphere and received the data instead. But Doctor Burnham can't seem to keep the data from falling into Control's hands and she is permanently anchored to the distant future.
When Doctor Burnham is pulled back into the future, Michael resolves to take up her mother's cause and keep Control from getting that data. As the Discovery cannot be destroyed and Control arrives with a fleet of remote operated Section 31 ships, the crew builds Michael her own Red Angel suit so she can jump the ship and the data into the distant future too.