Originally released 12 years earlier as "Labyrinth" for Expo 67 in Montreal, with a running time of 45 minutes. In 1972, a 21 minute version of the film was transferred to the IMAX format and screened at Ontario Place as "Labyrinth '72". The original multi-screen presentation was later integrated into a single flat-screen film, trimmed to 21 minutes, and re-released in 1979 as "In the Labyrinth".