Idea is the fifth album by the Bee Gees. Released in September 1968, the album sold over a million copies worldwide. The album was issued in both mono and stereo pressings in the UK. The artwork on the Polydor release designed by Wolfgang Heilemann featured a "beehive" neon lightbulb with a group photo in its base, while the North American ATCO release designed by Klaus Voormann featured a composite head made from each band member. It was their third internationally released album – the first two albums being released only in the Australian market.

"I.O.I.O." is a song by the Bee Gees, released on the album Cucumber Castle. It was written by Barry and Maurice Gibb. The song was released as a single in March 1970, and was also one of the highlights of the album. The single was a relative success mainly on European charts. Its music video is taken from the film Cucumber Castle.