“Star Trek: Discovery S5E3 Recap: ‘Jinaal'”
In this episode, Burnham and the crew deal with a mysterious phenomenon trapping them in a time loop. As they investigate, chaotic events unfold, including a surprise appearance by the Kelpien, who has been missing for years. Meanwhile, Book and Tarka encounter a dangerous situation while trying to bring peace to their respective planets. The suspense builds as the crew races against time to understand and escape the time loop.
Source: https://gizmodo.com/star-trek-discovery-season-5-episode-3-recap-jinaal-1851404289