S3E8
For the World is Hollow and I Have Touched the Sky
Episode Summary & Review
Summary
After Dr. McCoy informs Captain Kirk that he is dying, the Enterprise crew discovers a planetoid that is on a collision course with a inhabited world. Kirk, Spock and McCoy beam down and discover it is a populated space ship where most of the inhabitants having no clue they are on a space ship.
Our Take
A strong episode with a couple of wobbles, but Star Trek: The Original Series keeps its grip throughout.