Special Guest Stars Michelle Yeoh as Emperor Philippa Georgiou Augustus Iaponius Centarius Guest Stars Tig Notaro as Commander Jett Reno Rachael Ancheril as Commander Nhan Mary Chieffo as L'Rell Jayne Brook as Admiral Katrina Cornwell Ethan Peck as Spock Mia Kirshner as Amanda Grayson Alan van Sprang as Leland Rebecca Romijn as Number One Yadira Guevara-Prip as Me Hani Ika Hali Ka Po Co Starring Emily Coutts as Lt. Cmdr. Keyla Detmer Oyin Oladejo as Lt. Cmdr. Joann Owosekun Patrick Kwok-Choon as Lt. Cmdr. Gen Rhys Ronnie Rowe as Lt. Cmdr. Ronald Altman Bryce Julianne Grossman voices Discovery Computer Sara Mitich as Lt. Cmdr. Nilsson Raven Dauda as Dr. Tracy Pollard Hannah Spear as Siranna Hanneke Talbot as Lieutenant Mann Samora Smallwood as Lieutenant Amin Nicole Dickinson as Yeoman Colt Chai Valladares as Lieutenant Nicola Zarrin Darnell-Martin as Nurse Kyana Teresa as Doctor Thom Marriott as Council Member Glenn Hetrick as K'Vort