Two Episodes:
"Miri" (Episode 12): After beaming down to a planet that's identical to Earth, Kirk, Spock, McCoy, and a landing party find a decaying 20th century city inhabited only children.
"The Conscience Of The King" (Episode 13): There's a mass murderer aboard the U.S.S. Enterprise! Kirk beams up a man he believes to be Krodos the Executioner, thought to have died 20 years ago. Also includes original broadcast preview trailers.

DVD Features:

Region 1 Encoding
Keep Case
Interactive Menus
Scene Access
Original Broadcast Preview Trailers
Sensormatic Security Tag

William Shatner: Canadian Author/Actor, STAR TREK
Leonard Nimoy: American Actor/Director, STAR TREK
DeForest Kelley: Television actor, STAR TREK (1966)

Gene Roddenberry: writer, producer, creator, STAR TREK (1966)