Mariner teams up with a troubled ensign while the U.S.S. Cerritos hosts peace talks between warring civilizations.

Tawny Newsome (Lt. Beckett Mariner)
Jack Quaid (Lt. Brad Boimler)
Noël Wells (Lt. D'Vana Tendi)
Eugene Cordero (Lt. Sam Rutherford)
Dawnn Lewis (Captain Carol Freeman)
Jerry O'Connell (Commander Jack Ransom)
Fred Tatasciore (Lieutenant Shaxs)
Gillian Vigman (Dr. T'Ana)

Saba Homayoon (Ensign Olly)
Roan Lai (SquAaron)
Gabrielle Ruiz (Lieutenant T'Lyn/Radiara)
Paul Scheer (Lt. Cmdr. Andy Billups)
Carl Tart (Lieutenant Kayshon)

• The Veraflex Nebula is home to the sentient races of Cubes and Orbs, who have been at war since their home nebulae collided.
  
• Olly is the granddaughter of "Zeus", who was mentioned as one of the gods in the TOS episode "Who Mourns for Adonais?".