Perpetual Infinity
Summary
When the Burnhams' laboratory was attacked by Klingons years ago, Michael's mother donned the experimental time travel suit to go back in time an hour and warn them of the coming attack. She instead arrived 950 years in the future to find all sentient life destroyed by Control. Tethering herself to a nearby planet, Dr. Burnham made over 840 attempts to change the future, including moving humans to her new planet, Terralysium, to test how she can change history. Trying to stop Control from gaining the Sphere's data, Dr. Burnham was responsible for directing the Sphere to cross paths with the Discovery. Now, the Discovery crew plans to upload the Sphere data into the suit and send it to the future where Control cannot access it while keeping Dr. Burnham in the present, but a Control-possessed Leland intercepts their upload.
Summary from Wikipedia, CC BY-SA 4.0.
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