Doctor Who- Death to the Cybermen!

The Doctor, Jamie and Zoe arrive on the planet Tranth as a group of villages unite to battle a massive army of Cybermen who have chosen the planet as a base. But the odds are against them when it is discovered that the Cybermen have a massive facility on the planet capable of mass producing Cybermen at an alarming rate. The only chance is to get to the facility and destroy it, but can the Doctor and his companions succeed when some of the village leaders, sensing overwhelming defeat are plotting to ally themselves with the Cybermen?