A team of American parapsychologists travel to Wales to conduct a study of Margam Castle, one of the UK’s most haunted buildings.

A family is confronted by an unseen evil force

A psychiatrist plots to murder his wife so he can be with his mistress, but his wife mysteriously disappears before he can carry out his plan.

A commercial-jet captain (Chuck Connors) has ghosts on board from stones of an English abbey being shipped overseas.

A series of murders occur that mirror those committed by the Whitechapel Ripper. Through his experiments with psychoanalysis Dr Pritchard discovers a deadly violence in one of his young female…