This fifteenth series of Time Lord adventures finds the "Doctor" (Tom Baker) and his companion "Leela" (Louise Jameson) materialising on a remote rock where the local lighthouse is experiencing some mysterious goings on. Might a recent meteor strike and the freezing fog that is descending on them have anything to do with it? Well it might have something to do with a shipwreck shortly afterwards that sees a load of rather untrustworthy (and slightly flakey) posh folks seek shelter in the building that was previously the home of "Ben" (Ralph Watson) and his two colleagues. Suspicions mount even m...