On Saru's last mission as Captain Burnham's Number One, the team ventures to a seemingly abandoned planet to hunt for what might be the greatest treasure in the galaxy.

Sonequa Martin-Green (Captain Michael Burnham)
Doug Jones (Captain Saru)
Anthony Rapp (Lt. Cmdr. Paul Stamets)
Mary Wiseman (Lieutenant Sylvia Tilly)
Wilson Cruz (Dr. Hugh Culber)
Blu del Barrio (Ensign Adira Tal)
Callum Keith Rennie (Captain Rayner)
David Ajala (Cleveland Booker)

Oded Fehr (Admiral Charles Vance)
Chelah Horsdal (Laira Rillak)
Annabelle Wallis (Zora)
Eve Harlow (Moll)
Elias Toufexis (L'ak)

• Captain Rayner is asked by Starfleet to retire after botching the mission to capture Moll and L'ak.
  
• When Suru leaves the U.S.S. Discovery, Burnham offers Rayner his position.