Dream Theater

Discography and videography

:The most complete Dream Theater discography, including bootlegs, promos and compilations can be seen on the Dream Theater French Fan Club discography sections.

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;Studio albums and EPs

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;Live albums

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;Singles

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;Videos and DVDs

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;Notes

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• Scenes from a Memory is the first of a series of studio albums that, when listened to chronologically, flow into one another. The static at the end of "Finally Free" on Scenes from a Memory leads directly into the static at the beginning of "The Glass Prison" on Six Degrees of Inner Turbulence; the closing section of that album's final movement fades out, only to be reprised as a fade-in leading into "As I Am" on the next album Train of Thought, and the piano note played at the end of that album's last track, "In the Name of God," is the same note that opens Octavariums opening number, "The Root of All Evil."
• The three sections of "The Glass Prison" on Six Degrees of Inner Turbulence, the two sections of "This Dying Soul" on Train of Thought, and the two sections of "The Root of All Evil" on Octavarium comprise the first seven movements of a twelve-movement suite with lyrics by Mike Portnoy chronicling his involvement in the twelve steps of Bill Wilson's Alcoholics Anonymous program. Portnoy has stated his desire to perform the twelve movements in succession after the suite is completed, and each track thus far has been dedicated to Wilson. The songs are also lyrically and musically related to "The Mirror" and "Lie" on Awake, of which "The Mirror" also explicitly deals with Portnoy's alcoholism.
• Six Degrees of Inner Turbulence, the band's sixth full-length studio release, contains six songs and contains a reference to the number six in its title. Train of Thought, the band's seventh full-length studio release, contains seven songs. Octavarium, the band's eighth full-length release, contains eight songs and its title is derived from octavus, the Latin word meaning eight.