Hammer House of Mystery and Suspense was a short-lived anthology television series from Hammer Studios. Though similar in format to the 1980 series Hammer House of Horror, the Mystery and Suspense series had feature-length episodes, usually running around 70 minutes without commercials. The series was a co-production by Hammer Studios with 20th Century Fox Television, and is known in the United States as Fox Mystery Theater. Unlike 1980's Hammer House of Horror, all the episodes had American actors as either the leads or in key roles. It was first aired in the UK by ITV in 1984, though was not simulcast and was shown in different timeslots throughout the various ITV regions.