The Theater Equation is a 2016 live album and DVD/BluRay by Arjen Anthony Lucassen's progressive rock/metal rock opera project Ayreon. The Theater Equation consists of a live performance, with cast, choir and small orchestra, of the 2004 album The Human Equation. It marks the first time an Ayreon album was played live entirely, and the first Ayreon live release.

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Main Cast: Arjen Anthony Lucassen, James LaBrie, Marcela Bovio, Jermain van der Bogt, Mike Mills, Magnus Ekwall, Irene Jansen, Heather Findlay, Eric Clayton, Anneke van Giersbergen

Director: Yvette Boertje

Writer: Arjen Anthony Lucassen

Editor:

Cinematographer:

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