What does Star Trek have in common with headstones with shells and inverted writing, Texas Independence and Buffalo Soldiers? Find out answers and hear a ghost story or two on a tour of historic Houston cemeteries the Sunday before Halloween. Depart by bus from the Heritage Society and travel to Olivewood, College Memorial Park, Founders and Beth Israel. The tour ends back at the Heritage Society, former site of the Episcopal and Masonic cemeteries, to hear about Houstonians who were originally buried there.