 Interiors were shot in a studio located next door to the studio used  for filming _2001: A Space Odyssey (1968)_ (qv). A special effects  shot of a starry sky that was created for the movie was borrowed by  the producers of the TV series for use as an insert in an early edit  of the episode "Chimes of Big Ben". Though cut from the televised  version, the early edit of the episode including the 2001 footage  was later released on video and DVD. (The starry night shot appears  in the sequence where No. 6 uses a handmade device to study the sky  in hopes of determining The Villages location).