Six Degrees of Inner Turbulence is the sixth studio album by American progressive metal band Dream Theater, released as a double-disc album on January 29, 2002, through Elektra Records. It is the first full-length Dream Theater album to feature a title track.

James LaBrie – lead vocals
John Petrucci – guitars, backing vocals
Jordan Rudess – keyboards
John Myung – bass
Mike Portnoy – drums, backing vocals
Howard Portnoy – gong drum on "The Great Debate" outro

John Petrucci – producer
Mike Portnoy – producer
Doug Oberkircher ? engineering
J.P. Sheganowski – engineering assistance
Kevin Shirley – mixing
Claudius Mittendorfer – mixing assistance
George Marino – mastering
Eugene "UE" Natasi – mastering assistance
Dung Hoang – cover art illustration
Ken Schles – photography
May Redding – stylist (photography)
JMatic – art direction