The Invisible Enemy (airdate February 19, 1983)
(No Introduction)
"Next Week": Next week, the Doctor lands on present-day Earth, and discovers a scientist who is running experiments on a twelve-million-year-old skull that is, in fact, the recepticle for the Fendahl, a creature which lives on death, absorbing the life-force of anyone around it. Don't miss "Image of the Fendahl," next Saturday at 9.