Two episodes: The Man Trap (episode 6): When the U.S.S. Enterprise's landing party arrives on a planet to give a routine medical examination to it's inhabitants, a nightmare unfolds when several members die--each having every trace of salt removed from their bodies.
The Naked Time (episode 7): Sent to pick up a research team, the U.S.S. Enterprise finds the scienctists dead. One of the landing party brings the disease back to the crew, forcing surpressed emotions to the surface.

DVD FEATURES:

SENSORMATIC
Region 1 Encoding
Keep Case
Interactive Menus
Scene Access
Original Broadcast Preview Trailers

William Shatner: Canadian Author/Actor, STAR TREK
Leonard Nimoy: American Actor/Director, STAR TREK
DeForest Kelley: Television actor, STAR TREK (1966)
James Doohan: Television actor; STAR TREK (1966)
Walter Koenig: Ensign Pavel Chekov of "Star Trek"
Nichelle Nichols: American Actress
George Takei: Actor, STAR TREK