Riker questions his sanity as he confronts altered realities: a theatrical presentation on the Enterprise, a covert mission on Tilonus IV, and an alien insane asylum.

David Selburg (Doctor Syrus)
Andrew Prine (Lieutenant Suna)
Gary Werntz (Mavek)
Susanna Thompson (Jaya)
Alan Dean Moore (Wounded Crewmember)

• Susanna Thompson will later go on to play Lenara Kahn in the DS9 episode "Rejoined" as well as the Borg Queen on Voyager.