Guest Stars Wilson Cruz as Dr. Hugh Culber Rainn Wilson as Harcourt Fenton "Harry" Mudd Katherine Barrell as Stella Peter MacNeill as Baron Grimes 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 Lieutenant Commander Airiam Milton Barnes as Deck Crew #1 Hamza Fouad as Deck Crew #2 Jason Deline as Medical Officer Izaak Smith as Jogger #1