Rhithm section

Terry Bozzio (Zappa, UK, Missing Persons, Bozzio Levin Stevens)
drums.

Billy Sheehan (Talas, David Lee Roth, Mr. Big)
bass.

Trent Gardner (Magellan)
keyboards.

Wayne Gardner (Magellan)
electric and acustic guitars, additional  bass.

Lead vocalists

Bret Douglas (Cairo)
Matt Bradley (Dali's Dilemma)
James LaBrie (Dream Theater, Mullmuzzler, Leonardo, Winter Rose)
D. C. Cooper (Royal Hunt)
Trent Gardner (Magellan)

Soloists

John Petrucci (Dream Theater, Liquid Tension Experiment)
guitars

Steve Howe (Yes)
acoustic guitars

Derek Sherinian (Planet X, ex-Dream Theater, ex-Alice Cooper, ex-Kiss)
keyboards

Trent Gardner (Magellan)
keyboard and trombone

James Murphy (Death)
guitars

Michael Bemesderfer
flute and wind controller

Frederick Clarke
nylon string guitar

Matt Guillory (Dali's Dilemma)
keyboards

Brad Kaiser
additional MIDI percussion