Into the Labyrinth (Dead Can Dance album) and Gerrard played all instruments, without guest musicians. The lyrics are in English on tracks 2–4, 8, and 11. Gerrard sings in a self-created wordless vocal technique similar to glossolalia on tracks 1, 5–7, 9–10. Tracks 3 and 10 were performed a cappella. In the UK, the CD album was simultaneously released along a limited edition double vinyl LP (featuring "Bird" and "Spirit", the two 1991 bonus tracks from "A Passage in Time"). The title alludes to the classic legend of Greek mythology about Theseus going into the Labyrinth against the Minotaur. While not necessarily a concept album, this link
The Daedalus Variations original concept of an episode involving alternate realities was a room in Atlantis that shifts into alternate realities. However, the idea had several issues, including the possibility of no Atlantis in one reality, so Robert C. Cooper suggested using the "Daedalus". The final draft of "The Daedalus Variations" was completed on February 11. On February 12, the prosthetics meeting for the episode, as well as "The Seed", "Broken Ties" and "Whispers" took place, which most likely involved the unknown aliens featured from the episode. The appearance of the aliens was revealed in the advertisement for the episode on July 27.