Each program is introduced and book-ended by science fiction writer Arthur C. Clarke in short sequences filmed in Sri Lanka. The bulk of the episodes are narrated by Gordon Honeycombe.
In January 2008 the original series was released on DVD in the UK by Network and Granada. It features all of the 13 original episodes unedited and remastered in Digital Quality.
The Journey Begins. This episode introduces the themes that are explored in the remainder of the series.