Two young female teachers travel to the Yorkshire Moors where their friend had disappeared a year before, and it is not long before they encounter a man they believe to be her murderer.[3] That night, a violent storm breaks out, and they become stranded in the house where they are staying.
Leonard Maltin called the film an "OK mystery";[4] Allmovie called it a "taut British chiller";[5] and TV Guide wrote "though melodramatic and soundstage-bound, Terror House is still quite effective and eerie. Fog covers almost every exterior; cinematographer Gunther Krampf spent long periods getting the artificial fog at just the right density...The final film was almost too effective, and after initially getting an A rating from the British censor and being booked on the biggest cinema circuit in Britain, the rating was suddenly changed to H (for "Horrific"), making it off-limits for anyone under 16 years of age. The big circuits had a policy of showing only A films, so the independent cinemas became the big winners, getting an excellent thriller starring Mason, Britain's top leading man at the time."[6]
