(Portrayed by Kenneth Mitchell).

Kol-Sha was the father of Kol and head of the House of Kor in his stead after he was killed.

(Portrayed by Xavier Sotelo).

Captain Diego Vela was the Starfleet commanding officer in charge of Starbase 5.

(Portrayed by Kiara Groulx).

Rose was a young girl who lived in the New Eden colony on Terralysium. She was Jacob's daughter, and Captain Pike almost died saving her from a phaser that self-destructed while she was playing with it.

(Portrayed by Bahia Watson).

May Theresa Ahearn was a childhood friend of Sylvia Tilly's while she was a junior high school student at Musk Junior High. She even gave Tilly the nickname "Stilly" because she could never stay still.

After Tilly was shocked by a dark matter asteroid she was examining, she began hallucinating that May was an engineering ensign aboard the U.S.S. Discovery. Those hallucinations turned out to be the result of a spore entity that piggybacked on Tilly, attempting to communicate with her by manifesting someone from her memory, when in fact May had died on June 9, 2252 at the age of sixteen.

Once the entity was expelled from Tilly, it turned out to be a blob-like JahSepp, a species that lives inside the mycelial network.

(Portrayed by Andrew Moodie).

Jacob was a settler of New Eden, on Terralysium. Desperate to learn whether Earth survived World War III, he was the one who maintained the distress signal that brought the U.S.S. Discovery there.

(Portrayed by Sheila McCarthy).

The All-Mother of the New Eden settlement on Terralysium.

Federation medical frigate found crash-landed on an asteroid. The U.S.S. Hiawatha was downed during the Klingon War while en route to Starbase 36. The ship was on the asteroid for ten months and eleven days before being found by the U.S.S. Discovery.

(Portrayed by Rachael Ancheril).

Commander Nhan was an operations officer serving aboard the U.S.S. Enterprise in 2257 when she transferred to the U.S.S. Discovery to join Captain Pike and its crew. Once on the Discovery, she became their new Chief of Security. Because she was Barzan, she required a special breathing apparatus to survive M-class atmospheres.

Valentine was a Lurian aboard the U.S.S. Hiawatha when it crashed onto an asteroid. He took a piece of shrapnel to the left aortic valve of his heart and needed a transplant, but didn't have a donor - so Commander Reno saved his life by piggy-backing his heart to a dead Bolian to keep it beating.

An officer aboard the U.S.S. Discovery who specializes in Logic Sciences.

(Played by Tig Notaro)

Commander Jett Reno was Chief Engineer of the U.S.S. Hiawatha when it crash-landed on an asteroid. She transferred to the U.S.S. Discovery after they were rescued.

She was a widow to a Soyousian wife who died during the Klingon-Federation war, and kept a slender lifeline tattoo around her wrist to remember her.

(Portrayed by Sean Connolly Affleck).

Lieutenant Braeden Connolly was a science officer aboard the U.S.S. Enterprise under Captain Christopher Pike. He died in 2257 while on a mission to rescue the U.S.S. Hiawatha, which had crash-landed on an asteroid.

(Portrayed by Sara Mitich).

Lieutenant Mitich was an engineering officer aboard the U.S.S. Discovery. She took Airiam's place on the bridge after her death.

Mike McMahan is best known for his work on the Emmy Award-winning Rick and Morty, which he currently serves as executive producer and showrunner, and as the author of "Star Trek: The Next Generation -- Warped: An Engaging Guide to the Never-Aired 8th Season," an official parody book published in 2015. Among his upcoming projects is Solar Opposites, an animated show set to debut in 2020. McMahan lives in Los Angeles with his wife, two sons and the family's cat, Riker

Harry Mudd, back to his old tricks of stealing and double-dealing, finds himself in a precarious position aboard a hostile ship – just in time to try out his latest con.

Before he was the first Kelpien to join Starfleet, Saru lived a simple life on his home planet of Kaminar with his father and sister. Young Saru, full of ingenuity and a level of curiosity uncommon among his people, yearns to find out what lies beyond his village, leading him on an unexpected path.

(Portrayed by Hannah Spear).

Saru's younger sister. She became the priest of Saru's home village on Kaminar after he left with then-Lieutenant Georgiou on the U.S.S. Archimedes.

After waking up in an unfamiliar sickbay, Craft finds himself on board a deserted ship, and his only companion and hope for survival is an A.I. computer interface.

(Portrayed by Annabelle Wallis (voice) and Sash Striga (avatar)).

The name of the U.S.S. Discovery's A.I. computer interface.

(Portrayed by Aldis Hodge)

Craft finds himself on board a deserted ship, and his only companion and hope for survival is an A.I. computer interface.