Season: 2

Original Airdate: March 8, 1968

Writer(s): Teleplay: D. C. Fontana
Story: Laurence N. Wolfe

Director(s): John Meredyth Lucas

Guest Stars
Barry Russo as Commodore Robert Wesley
William Marshall as Dr. Richard Daystrom
Sean Morgan as Ensign Harper
Frank da Vinci as Lt. Brent
Eddie Paskey as Lt. Leslie
William Blackburn as Lt. Hadley
Roger Holloway as Lt. Lemli

Stardate: 4729.4

Synopsis: The M-5, a new computer, takes control of the Enterprise during war games.