The Star Trek franchise is expanding on CBS All Access. The streaming service has announced Star Trek: Short Treks, four stand-alone short stories that will begin rolling out on Thursday, October 4 ahead of the early 2019 Season 2 return of Star Trek: Discovery.

Each of the four stories will center on a key character, including familiar faces from Star Trek: Discovery: Mary Wiseman (Tilly), Doug Jones (Saru) and Rainn Wilson (Harry Mudd), in a short he will also direct, as well as a new character unfamiliar to fans, Craft, played by Aldis Hodge.

Star Trek: Discovery follows the voyages of Starfleet on their missions to discover new worlds and new life forms, and one Starfleet officer who must learn that to truly understand all things alien, you must first understand yourself. The series features a new ship and new characters while embracing the same ideology and hope for the future that inspired a generation of dreamers and doers. The series is produced by CBS Television Studios, Secret Hideout and Roddenberry Entertainment.

Descriptions and premiere dates of the four installments as well as a preview clip follow below.

Runaway – Thursday, Oct. 4

Onboard the U.S.S. Discovery, Ensign Tilly (Mary Wiseman) encounters an unexpected visitor in need of help. However, this unlikely pair may have more in common than meets the eye.

Written by Jenny Lumet & Alex Kurtzman. Directed by Maja Vrvilo.

Calypso – Thursday, Nov. 8

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

Teleplay by Michael Chabon. Story by Sean Cochran and Michael Chabon. Directed by Olatunde Osunsanmi.

The Brightest Star – Thursday, Dec. 6

Before he was the first Kelpien to join Starfleet, Saru (Doug Jones) 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.

Written by Bo Yeon Kim & Erika Lippoldt. Directed by Douglas Aarniokoski.

The Escape Artist – Thursday, Jan. 3

Harry Mudd (Rainn Wilson), 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.

Written by Michael McMahan. Directed by Rainn Wilson.