Star Trek: Discovery, Series 4, Episode 1.
First broadcast on Thursday 18 November 2021.

The crew of the USS Discovery are really settling down and starting to enjoy their new life in the 32nd century — fixing some butterflies’ GPS network, giving a commencement speech to some socially-distanced Starfleet Academy students, and fixing the unexpected and alarming angular velocity of a Federation space station. Then suddenly an unimaginable tragedy strikes.