During Season 5 the tune was altered slightly and had more of a 'Big Band' feel. It was changed back to the original in Season 6. In several episodes the theme has been slightly altered (see below for video)
The opening title sequence, which was produced by the London graphic design firm SVC Television, opens with computerized shots of planets and celestial bodies, some either with the planets dancing or moving in warp speed. It opens and closes with a shot of Earth (which at the open is where the show's title logo appears, after a sunburst appears on the side of Earth).
For the episode "Dick'll Take Manhattan" only, the typeface of the cast and creators' names was altered.