En route to observe part of a trinary star system, the crew finds their routine tasks turning into uncharacteristically strange obsessions over trivial matters. Unaffected by the compulsive behavior, T'Pol investigates and finds a dangerous factor at work on her crewmates.

Matthew Kaminsky (Crewman Cunningham)

• The star system consists of two stars orbiting a black hole. The radiation from the system caused the crew's change in behavior.