Just as Captain Pike thinks he’s figured out how to escape his fate, he’s visited by his future self, who shows him the consequences of his actions.

Anson Mount (Captain Christopher Pike)
Ethan Peck (Lieutenant Spock)
Jess Bush (Nurse Christine Chapel)
Christina Chong (Lt. La'an Noonien-Singh)
Celia Rose Gooding (Cadet Nyota Uhura)
Babs Olusanmokun (Dr. Joseph M'Benga)
Melissa Navia (Lt. Erica Ortegas)
Rebecca Romijn (Lt. Commander Una Chin-Riley)

Paul Wesley (Captain James T. Kirk)

Melanie Scrofano (Captain Batel)
Dan Jeannotte (Lt. Samuel Kirk)

Mathieu Bourassa (Romulan Subcommander)
André Dae Kim (Chief Kyle)
Rong Fu (Lt. Jenna Mitchell)
Ali Hassan (Cmdr. Hansen Al-Salah)
Matthew MacFadzean (Romulan Commander)
Ian Rayburn (Groom)
Chris River (Maat Al-Salah)
Megha Sandhu (Bride)
Carolyn Scott (Praetor)
Matthew Wolf (Engineer)

• Season finale.
  
• This episode presents an alternate version of the classic episode "Balance of Terror".
  
• The crew meets with Cmdr. Hansen Al-Salah on Outpost 4, located on an asteroid near the Romulan Neutral Zone. When Pike meets Hansen's son Maat, he realizes Maat will be one of the cadets that dies during his future accident.
  
• In the alternate future, James Kirk is captain of the U.S.S. Farragut NCC-1647.
  
• Captain Batel is commanding officer of the U.S.S. Cayuga. She and Pike are still seeing each other. She takes Number One into custody at the end of the episode.