The Varrow Mission

In the year 1950 an old miner has a strange encounter with an alien space craft outside an old abandoned flow mill. Twenty years later Mr. Cranston tells the legend of the space craft to Carl a local high school boy, to whom he gives permission to use the mill for the local Halloween Spook Show. The weird and strange events which then take place end with the mill being burnt and the alien creature being destroyed... or is it?