- Author Existence Failure: Daevid Allen died of cancer in 2015.
- Creator Couple:
- Daevid Allen and wife Gilli Smyth co-founded the band. In later years, Smyth would front the Spin-Off Mother Gong with contributions from Allen.
- When Steve Hillage took over leadership of Gong for Shamal, his partner Miquette Giraudy was brought on as a vocalist. Both left after the album's release.
- Face of the Band:
- Allen, Moerlen, and Smyth for Gong, Pierre Moerlen's Gong, and Mother Gong respectively.
- An inversion in the case of Pierre Moerlen's Gong. After they broke up in the early 1980s, Moerlen performed with the Swedish Progressive Rock band Tribute. When came time to record a new studio album, bassist/guitarist Hansford Rowe (until that point the only other musician to appear on all PMG albums) was recruited and Breakthrough was released under the moniker Pierre Moerlen's Gong.
Trivia / Gong