Star Trek: The Original Series: Vol. 2.6

A PRIVATE LITTLE WAR Stardate: 4211.4 Captain Kirk returns to the planet Nueral and discovers a difference between now and his trip o thirteen years before. War has erupted, with the use of much more advanced weapons than either side could of developed. He discovers that the Klingons have been arming their chosen faction with flintlocks... US AIRDATE: 2.2.1968 THE GAMESTERS OF TRISKELON Stardate: 3211.7 Kirk, Ulhura and Chekov are abducted, whilst in the transporter beam, by a powerful race of aliens. They are desposited upon the planet Triskelion where they are to become little more than aming animals. They are trained as gladiators and expected to fight for the amusement of the 'Providers'... US AIRDATE: 5.1.1968 OBSESSION Stardate: 3619.2 The Enterprise is threatened by a murderous cloud creature which attacks a landing party. Kirk realises he has met the being before, many years ago, whilst he was still an ensign on the U.S.S. Farragut. That time it killed his captain. He becomes obsessed with it's pursuit and destruction... US AIRDATE: 15.12.1967