After being pulled into orbit around a dead star, the USS Enterprise comes across a huge, deserted starship inhabited by a parasitic life form.

After a trip back in time to observe the history of the Orion civilization, Spock returns and discovers that he has been erased from the present.

The Enterprise's crew races to find a way to stop a giant cloud creature from destroying inhabited planets.

A race of beautiful women remains immortal by draining the life force of men.

Cyrano Jones resurfaces with new tribbles that can't multiply and Klingons hot on his trail.

The Enterprise finds missing trader and philanthropist Carter Winston.