Discovery Season 3:
Barrier: New Captain Saru is ordered to reactivate the Spore Drive and explore beyond the Galaxy. Unfortunately, a strange energy field disables the ship and they're attacked by the godlike crew of the SS Valiant
The Craters: Two famous archaeologists hitch a ride with Discovery in order to investigate Professor Crater's Preserver theory on several abandoned planets. The Preservers, not wanting to be exposed, send a cadre of salt vampires after them.
The Farthest Point: Saru and the ship deliver supplies to Deep Space Station 1, located in the Deneb system, farther than any other Federation outpost. A native insurgency erupts at Starfleet's presence, and issues regarding the Prime Directive are tossed aside when Discovery is attacked by the all-too-real Bandi Gods.
Prophecy: The peaceful Cardassian people are under attack by their neighbors, the militaristic Fourth Bajoran Republic, who believe that their legendary messiah will come from amongst the stars following a devastating war. Lieutenant Bryce steps in after he is identified from ancient inscriptions to be the Bajoran messiah.
Sporocystian: The jahSepp are at war with the Sporocystians within the mycelial network, causing mass deaths across the multiverse. Stamets and Tilly enter the network, at May's request, and convince the Sporocystians the value of life and to end their feud.
Working Arrow: At an Enterprise reunion in Oklahoma, all surviving crew members of the NX-01 are abducted. Commodore April commandeers the Discovery to search for clues on the new Suliban homeworld. They are attacked by the Cabal, in concert with the Tholians, Xindi, the House of Klaang, and the Na'Kuhl, all controlled from the Sphere-based headquarters of a former Federation President who faked his own death and went mad.