Defying the Federation’s vote, Book and Tarka steal an experimental spore drive and go rogue to destroy the anomaly. The Race to Species 10-C (Episodes 8–12)
The Federation holds a summit to decide whether to destroy the DMA or attempt peaceful first contact. Captain Burnham advocates for diplomacy, while Book, driven by the loss of his homeworld, sides with the rogue scientist Ruon Tarka to destroy it. Star Trek: Discovery S04E07-13 FRENCH HDTV
Discovery’s computer, Zora , achieves full sentience and initially refuses to provide the DMA's coordinates to protect the crew. After being recognized as a new lifeform and joining Starfleet, she eventually shares the data. Defying the Federation’s vote, Book and Tarka steal
In the latter half of Season 4 (Episodes 7–13), shifts from investigation to a high-stakes race for survival and first contact. The season concludes with the Federation facing the creators of the Dark Matter Anomaly (DMA) to prevent the destruction of Earth and Ni'Var. The Mid-Season Conflict (Episode 7) Discovery’s computer, Zora , achieves full sentience and
Discovery pursues Book and Tarka outside the galactic barrier, entering a region of space never before explored.
Tarka is revealed to be motivated by a desire to reach a parallel universe to reunite with his lost friend, Oros. His reckless plan to steal the DMA's power source threatens to destroy the very civilizations Burnham is trying to save. The Grand Finale: "Coming Home" (Episode 13)
The crew discovers that the creators of the DMA, Species 10-C , are a highly advanced collective that communicates through complex hydrocarbon compounds representing emotions and mathematical equations.