Story By: Robert Hamner
Writers: Robert Hamner and Gene L. Coon
Director: Joseph Pevney

Captain Kirk: William Shatner
Science Officer, First Officer, Cmdr. Spock: Leonard Nimoy
Dr. Leonard "Bones" Mc Coy: DeForest Kelly
Lt. Sulu: George Takei
Lieutenant Commander Montgomery Scott: James Doohan
Lieutenant Uhura: Nichelle Nichols

Ambassador Robert Fox: Gene Lyons
Anan 7: David Opatoshu
Sar 6: Robert Sampson
Mea 3: Barbara Babcock
Lt. Galloway: David L. Ross
Tamura, Yeoman: Miko Mayama
Lt. DePaul: Sean Kenney

Stardate 3192.1

  On their way to Eminiar VII the Enterprise picks up Ambassador Robert Fox on a diplomatic mission. When they reach the planet, they are advised not to visit, but Fox insists on being beamed down. Kirk and the others are met by a Mea 3, a young woman. She informs them that there is war between Eminiar VII and Vendikar, the neighboring planet, it was started more than 500 years ago. To eliminate pain and destruction the war is fought by computers. 

Her fiancee, Anan 7, informs them that the two planets have learned to avoid the complete devastation of war by declaring casualties by calculations. If an area is hit, the people come in voluntarily to antimatter chambers where they are vaporized. They get another information: The Enterprise was hit and all crew are declared casualties. Kirk refuses to accept that and they are arrested. 

When Scotty is ordered to take down the defense shields, he refuses – not without his captain's order. When Spock beams down and overhears a call from his captain, he easily fights the guards and destroys the antimatter chamber. Kirk and Spock escape and destroy the computers who have taken away the reality of war. Facing the brutal consequence of a real war, the people of Eminiar rather engage in peace talks – with the help of Ambassador Fox.