The Lower Deckers go on a classic cave mission.

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)

Asif Ali (Ensign Asif)
Zach Cherry (Ensign Amadou)
Artemis Pebdani (Ensign Karavitus)
Paul Scheer (Lt. Cmdr. Andy Billups)

• While trapped in the cave, the lower deckers tell stories of when they were trapped in caves with other crew members.
  
• Fred Tatasciore also provides the voice for Ensign Steve Levy, the conspiracy nut.