Synopsis:

Responding to a false distress signal the Enterprise finds itself taken over by a group of Kelvans.  Now the ship is heading back to their home, the Andromeda Galaxy, on a journey that will take centuries.   With most of the crew neutralized the remaining crew members must find a way to defeat the Kelvans and retake their ship.

An excellent episode.  One of my favorite things is that this episode killed off the wrong person.  From the perspective of the times the woman should certainly have been saved and she wasn't.  I also think that some of the scenes are among the best written.  Scotties drinking contest is one of my absolute favorites and is also very often quoted by all Star Trek fans.  So sit back, enjoy, and remember..."I don't know, but its green."