Kirk and Spock go back in time to restore history
The City on the Edge of Forever was uploaded by: CBS
Duration: 3027
Rating:

Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV.
The Menagerie – Part 1 was uploaded by: CBS
Duration: 2963
Rating:

Kirk, Scott, McCoy and Uhura enter a parallel universe
Mirror, Mirror was uploaded by: CBS
Duration: 3026
Rating: