Bypassing Starfleet's orders, Captain Gabriel Lorca uses the U.S.S. Discovery crew's ultimate asset — the ship itself — in an effort to end the war with the Klingons once and for all.

Sonequa Martin-Green (Specialist Michael Burnham)
Doug Jones (Commander Saru)
Shazad Latif (Lt. Ash Tyler)
Anthony Rapp (Lt. Paul Stamets)
Mary Wiseman (Cadet Sylvia Tilly)
Jason Isaacs (Captain Gabriel Lorca)

Jayne Brook (Admiral Katrina Cornwell)
Mary Chieffo (L'Rell)
Wilson Cruz (Dr. Hugh Culber)
Kenneth Mitchell (General Kol)

Michael Ayres (Transporter Technician)
Conrad Coates (Admiral Terral)
Emily Coutts (Lt. Keyla Detmer)
Julianne Grossman (Discovery Computer)
Patrick Kwok-Choon (Lt. Gen Rhys)
Sara Mitich (Lt. Cmdr. Airiam)
Oyin Oladejo (Lt. Joann Owosekun)
David Benjamin Tomlinson (Klingon Bridge Officer)

• This episode is the Fall 2017 Finale, and the end of the group of episodes marketed as "Chapter 1."
  
• Burnham and Tyler plant sensors aboard the Klingon sarcophagus ship. After Stamets makes 133 spore jumps to collect data, they are able to track the ship and destroy it.
  
• Burnham rescues Admiral Cornwell, but Tyler is crippled by PTSD after running into L'Rell. L'Rell beams back to Discovery with them and is imprisoned in the brig.
  
• Lorca manipulates Stamets into making one more jump. During the jump, Lorca appears to override the navigation and the ship ends up in unknown space.