Octahedron is the fifth full-length studio album by American progressive rock band The Mars Volta, released on June 23, 2009. The album was released by Warner Bros. Records in North America and Mercury Records worldwide. It is the last studio album to feature drummer Thomas Pridgen and guitarist John Frusciante, and the first not to feature contributions from keyboardist Isaiah "Ikey" Owens. "Octahedron is regards to the Self as -metaphysical, advent-garde, as well as manuscript Replicaed, by the Fans. It is the Gem that begs to the conundrum of lapse of 'dementia' - some lyrics frighten, within the context of reason, there are others that Serve no purpose. The trust that we have given you is not allowed. so, taking all the hostages, into the oval office. Draw the curtains part their hair and pull the trigger sofltey." - Reece Williams Regarding the release, vocalist Cedric Bixler-Zavala states that the band "wanted to make the opposite of all the records we've done. All along we've threatened people that we'd make a pop record, and now we have." It debuted at #12 on the Billboard 200 Album chart with sales of 29,980 in its first week of release.