Dream Theater began the Octavarium Tour in support of "Octavarium" in Europe on June 10, 2005, beginning at the Sweden Rock Festival in Sölvesborg. The band co-headlined the "Gigantour" with Megadeth across North America from July 21 to September 3. The Montreal concert was recorded and released as a live album and concert video on August 22, 2006 and September 5, 2006 respectively, titled "Gigantour". The main "Octavarium" world tour began in September in Finland, and saw the band continue with their "An Evening With Dream Theater" concert format. This meant the band would play for almost three hours, with a different setlist each evening. Many of the shows would center around a tour of the band's history to that point, featuring a song (or part of a longer song) for each album before wrapping up the regular set with several from "Octavarium". Combined with interviews, rehearsals during soundcheck and meet-and-greet sessions with fans, the band became physically and mentally drained.