<Li> Mary Wiseman as Sylvia Tilly: A cadet in her final year at Starfleet Academy, assigned to the Discovery . She works under Stamets aboard the Discovery, where she becomes roommates with Burnham . The character was included to represent people "at the very bottom of this ladder" of the Starfleet hierarchy . She is "the most optimistic...has the biggest heart", and showrunner Aaron Harberts described her as "sort of the soul of our show ." </Li> <Li> Jason Isaacs as Gabriel Lorca: Captain of the Discovery, a "brilliant military tactician". Isaacs described the character as "probably more f-d up than any of" the previously seen Star Trek captains . He plays the character with a slight southern U.S. accent, and had initially wanted to ad - lib a catchphrase for the character feeling that all Star Trek captains should have one, coming up with "git'r done" which the writers turned down due to it being widely used and trademarked by Larry the Cable Guy . </Li> <Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original release date </Th> </Tr> <Tr> <Th> </Th> <Td> "The Vulcan Hello" </Td> <Td> David Semel </Td> <Td> Story by: Bryan Fuller & Alex Kurtzman Teleplay by: Akiva Goldsman & Bryan Fuller </Td> <Td> September 24, 2017 (2017 - 09 - 24) </Td> </Tr> <Tr> <Th> </Th> <Td> "Battle at the Binary Stars" </Td> <Td> Adam Kane </Td> <Td> Story by: Bryan Fuller Teleplay by: Gretchen J. Berg & Aaron Harberts </Td> <Td> September 24, 2017 (2017 - 09 - 24) </Td> </Tr> <Tr> <Th> </Th> <Td> "Context Is for Kings" </Td> <Td> Akiva Goldsman </Td> <Td> Story by: Bryan Fuller & Gretchen J. Berg & Aaron Harberts Teleplay by: Gretchen J. Berg & Aaron Harberts & Craig Sweeny </Td> <Td> October 1, 2017 (2017 - 10 - 01) </Td> </Tr> <Tr> <Th> </Th> <Td> "The Butcher's Knife Cares Not for the Lamb's Cry" </Td> <Td> Olatunde Osunsanmi </Td> <Td> Jesse Alexander & Aron Eli Coleite </Td> <Td> October 8, 2017 (2017 - 10 - 08) </Td> </Tr> <Tr> <Th> 5 </Th> <Td> "Choose Your Pain" </Td> <Td> Lee Rose </Td> <Td> Story by: Gretchen J. Berg & Aaron Harberts & Kemp Powers Teleplay by: Kemp Powers </Td> <Td> October 15, 2017 (2017 - 10 - 15) </Td> </Tr> <Tr> <Th> 6 </Th> <Td> "Lethe" </Td> <Td> Douglas Aarniokoski </Td> <Td> Joe Menosky & Ted Sullivan </Td> <Td> October 22, 2017 (2017 - 10 - 22) </Td> </Tr> <Tr> <Th> 7 </Th> <Td> "Magic to Make the Sanest Man Go Mad" </Td> <Td> David M. Barrett </Td> <Td> Aron Eli Coleite & Jesse Alexander </Td> <Td> October 29, 2017 (2017 - 10 - 29) </Td> </Tr> <Tr> <Th> 8 </Th> <Td> "Si Vis Pacem, Para Bellum" </Td> <Td> John S. Scott </Td> <Td> Kirsten Beyer </Td> <Td> November 5, 2017 (2017 - 11 - 05) </Td> </Tr> <Tr> <Th> 9 </Th> <Td> "Into the Forest I Go" </Td> <Td> Chris Byrne </Td> <Td> Bo Yeon Kim & Erika Lippoldt </Td> <Td> November 12, 2017 (2017 - 11 - 12) </Td> </Tr> <Tr> <Th> 10 </Th> <Td> "Despite Yourself" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> January 7, 2018 (2018 - 01 - 07) </Td> </Tr> <Tr> <Th> 11 </Th> <Td> "The Wolf Inside" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> January 14, 2018 (2018 - 01 - 14) </Td> </Tr> <Tr> <Th> 12 </Th> <Td> "Vaulting Ambition" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> January 21, 2018 (2018 - 01 - 21) </Td> </Tr> <Tr> <Th> 13 </Th> <Td> "What's Past is Prologue" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> January 28, 2018 (2018 - 01 - 28) </Td> </Tr> <Tr> <Th> 14 </Th> <Td> "The War Without, The War Within" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> February 4, 2018 (2018 - 02 - 04) </Td> </Tr> <Tr> <Th> 15 </Th> <Td> "Will You Take My Hand?" </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> February 11, 2018 (2018 - 02 - 11) </Td> </Tr> </Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original release date </Th> </Tr>

When does episode 2 of star trek discovery come on