Strange energy bursts from the galaxy's edge compel Starfleet to assign Captain Christopher Pike to take command of Discovery and investigate.
A new signal lures the Discovery to a distant planet that is inhabited by the descendants of human survivors from a war on Earth centuries earlier.
Turmoil on the Klingon homeworld requires the intervention of a secretive Starfleet order, while Burnham hosts a family member in search of answers.
Discovery is trapped by a sphere that may be intelligent, while a physical transformation overwhelms Saru, and Tilly is seized by a hostile life form.
Discovery attempts a dangerous mission to rescue Tilly from the mycelial network, with assistance from some old friends now serving in Section 31.
A new red burst appears near Saru's homeworld of Kaminar, forcing the Discovery into a confrontation with the Ba'ul, the planet's dominant species.
Burnham travels to Vulcan looking for Spock while Pike teams up with Tyler to investigate a time-displacement phenomenon left in the Red Angel's wake.
Burnham takes Spock to the restricted planet Talos IV, hoping its mysterious residents can restore her brother's mind. Pike defies Section 31.
Admiral Cornwell enlists the Discovery crew in arresting a leader of Section 31, while Spock tries to understand why the Red Angel targeted him.
After a startling revelation about the origins of the Red Angel, the Discovery crew devises a plan to capture the entity -- by risking Michael's life.
Starfleet fights to block the artificial intelligence Control from seizing the Sphere data -- a course of action that will have a devastating outcome.
Another signal draws the Discovery to the Klingon planet Boreth and a precious resource found there that gives Pike a shocking glimpse of his future.
With a Section 31 fleet bearing down on them, the Discovery crew abandons ship while Michael proposes what she expects to be her final mission.
As a new time suit takes shape, Spock and Michael come to an understanding, while Captain Pike faces overwhelming forces and narrowing options.
Commander Michael Burnham of the Federation starship U.S.S. Shenzhou disputes her captain's peaceful stance when their ship encounters hostile forces.
Escaping from the brig while the ship is under attack, Burnham joins the captain in an audacious plan to end a battle rapidly escalating into war.
Michael's shuttle is intercepted by Captain Gabriel Lorca of the mysterious U.S.S. Discovery, who orders her to join a dangerous recovery mission.
Voq faces a powerful challenge in his pursuit of T'Kuvma's agenda, while Michael discovers a possible solution to the ship's propulsion difficulties.
When Lorca is kidnapped by the Klingons and imprisoned with an eccentric cell mate, the Discovery is assigned to rescue him despite Michael's doubts.
Michael uses her connection to Sarek to help locate him after he is wounded in an assassination attempt. Lorca deals with an unexpected visitor.
A figure familiar to Lorca and Lt. Tyler from the Klingon prison ship attacks the Discovery, intending to deliver the ship to their former captors.
Michael, Ash and Saru explore a planet with unique communication properties while Lorca heads into battle and Admiral Cornwell attempts to escape.
Ignoring a direct order, Lorca sends Burnham and Tyler on a mission to override the Klingon invisibility device from aboard the enemy flagship.
Tyler battles post-traumatic stress while a spore-drive mishap strands the Discovery in an alternate universe where many roles are reversed.
Tilly proposes a radical procedure to save Stamets while Michael defies the emperor to contact the mysterious leader of a hidden rebel camp.
Trapped in the mycelial network, Stamets crosses paths with a pair of familiar faces. Michael wrestles with her emotions upon meeting the emperor.
His true intentions revealed, Lorca foments a rebellion on the emperor's ship, leaving Michael trapped by loyalty between two former captains.
The Discovery crew makes it home only to learn that the Federation is losing the war with the Klingons, and a new, desperate plan must be formulated.
Starfleet orders a risky operation on the Klingon homeworld that could end the war in victory, but Michael questions the ethics of their mission.