Ensign Jordan is the Enterprise crewman on duty in auxiliary control in I, Mudd who is knocked out by the android Norman when it hijacks the ship.
Ensign Jordan is a junior officer of the USS Enterprise in the Original Series episode I, Mudd. He is standing watch in auxiliary control when the recently arrived Lieutenant Norman walks in.
Norman, in fact an android, disables Jordan with a single blow and takes over the room. From there it locks the ship on a new course, seals off engineering and rigs the controls so that any interference will destroy the Enterprise.
Jordan is found unconscious as the crew tries to work out what has happened. The ship is carried for days to an uncharted planet where Harry Mudd rules over a population of androids who intend to keep the crew for study.