(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.

Aldis Hodge hails from North Carolina and counts among his early credits Die Hard with a Vengeance, Bed of Roses, Buffy the Vampire Slayer and Judging Amy. His more recent projects include Leverage, Straight Outta Compton, Hidden Figures, Underground and Black Mirror, as well as Brian Banks, Magic Camp and What Men Want.

Michael Chabon is one of America's most-renowned authors, as well as a busy film/TV producer writer and producer. His books include Wonder Boys (1995), The Amazing Adventures of Kavalier & Clay (2000, which won the Pulitzer Prize for fiction), The Yiddish Policemen's Union (2007, which won the Hugo, Ignotus, Sidewise and Nebula Awards) and Telegraph Avenue (2012). Additionally, Chabon penned the screen story for Spider-Man 2 and the script for John Carter. His upcoming projects include the series Unbelievable, which he's co-writing and co-producing with his wife, Ayelet Waldman.

The daughter of filmmaker Sidney Lumet and journalist Gail Buckley, Jenny Lumet is a respected screenwriter who has also occasionally acted (in such films as Q&A and Dodgeball). Her work as a writer includes Rachel Getting Married and The Mummy (on which she received a Story By credit along with Alex Kurtzman and Jon Spaihts).

Mimi Kuzyk played Siobhan Tilly, the mother of Sylvia Tilly, in “Runaway,” the first Star Trek: Short Treks episode. The Canadian actress is a movie and TV veteran who has appeared in the likes of Hill Street Blues, Wolf, Quantum Leap, Total Recall 2070, Lost and Delirious, The Day After Tomorrow, Castle, Special Correspondents, Unreal and Shadowhunters.

Yadira Guevara-Prip is the actress who played Me Hani Ika Hali Ka Po, the young Xahian stowaway whom Sylvia Tilly befriends in the Star Trek: Short Treks installment, “Runaway.” Her other credits include episodes of the shows Mad Dogs, Supernatural and See.

Maja Vrvilo got her start as an editor, working on several shorts, as well as the film Temps and such TV shows as The Agency, Cold Case and Hawaii Five-O. She made the move into directing in 2015 with an episode of Graceland, and has since helmed shows including Person of Interest, Preacher, Hawaii Five-O. Gotham, Blindspot and Salvation.

Geet Arora is the actor who portrayed Worker Bee #2 in the Star Trek: Short Treks installment, “Runaway.” His other credits include The Beaverton, Workin’ Moms and Taken.