- Dream Theater
- James LaBrie – lead vocals
- John Myung – bass
- John Petrucci – guitars and backing vocals
- Mike Portnoy – drums, percussion and backing vocals (co. lead vocals on "Constant Motion, and The Dark Eternal Night")
- Jordan Rudess – keyboards and continuum
- Guest spoken words on "Repentance"
- Corey Taylor
- Steve Vai
- Chris Jericho
- David Ellefson
- Daniel Gildenlöw
- Steve Hogarth
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- Joe Satriani
- Mikael Åkerfeldt
- Steven Wilson
- Jon Anderson
- Neal Morse
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- Production
- John Petrucci and Mike Portnoy – producers
- Paul Northfield – engineer, mixing, vocal track co-producer
- Chad Lupo – assistant engineer
- Hugh Syme – art direction, design, illustration
- Daragh McDonagh – photography
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