Trivia: This was the first of seven horror anthologies that Peter Cushing (who plays Dr. Terror) appeared in. The others were "Torture Garden" in 1967, "The House That Dripped Blood" in 1971, "Tales From The Crypt" and "Asylum" (both in 1972), "From Beyond The Grave" in 1974 and "The Uncanny" in 1977.
Other mistake: In the opening credits, the composer of the movie score is credited as "Elizabeth Lutyens", with a Z. Her proper name was Elisabeth, with an S. (00:00:50)
Hopkins: Plant like that... could take over the world.