When the crew gets trapped in the holodeck by a mysterious malfunction, they aren't sure what's programmed or what's real.

Kate Mulgrew (Hologram/Vice Admiral Kathryn Janeway)
Brett Gray (Dal R'El)
Ella Purnell (Gwyn)
Jason Mantzoukas (Jankom Pog)
Angus Imrie (Zero)
Rylee Alazraqui (Rok-Tahk)
Dee Bradley Baker (Murf)
Jimmi Simpson (Drednok)
John Noble (The Diviner)

Jason Alexander (Doctor Noum)
Bonnie Gordon (Ship Computer)