Fang Rock Lighthouse stands somewhere off the South Coast of England in the early 1900s. Its three keepers have lately noticed a strange fog, and one has seen an eerie light in the water. Soon one of them is dead, and Old Reuben believes that legend is about to become reality.

When the Doctor and Leela arrive, they become involved in a frightening fight for survival. A shipwreck brings four others in search of shelter, but nobody's safety can be guaranteed on Fang Rock that night. With the lighthouse under attack, one by one the humans are picked off. The Doctor needs all of his initiative and ingenuity if he and Leela are to survive.

Tom Baker stars as the Fourth Doctor in this thrilling full-cast TV soundtrack adventure from 1977, with linking narration by Louise Jameson. In a special bonus interview, she recalls her time as Leela in the BBC TV series.