Bass – Mike Porcaro
Drums – Jeff Porcaro
Engineer [Additional Engineer] – Dan Garcia, Doug Linnell, Duane Seykora, Jack Puig*, John Jessel, Julie Last, Mike Ross*, Murray Dvorkin, Teruo "Mu" Murakami
Guitar, Vocals – Steve Lukather
Keyboards, Electronics – Steve Porcaro
Keyboards, Vocals – David Paich
Management – Fitzgerald Hartley
Mastered By – Bob Ludwig
Other [Production Coordinator, Band Mobilizer And Bro] – Chris Littleton
Percussion – Lenny Castro (tracks: 1, 2, 4, 5, 7 to 9)
Photography By [Sleeve Photography] – Jim Shea
Public Relations – Jensen Communications
Technician – Art Kelm*, Bob Bradshav*, Brent Averill, Eli Slawson, John Jessel, Keith Albright, Paul Jamieson, Roger Linn, Roger Nichols
Vocals – Joseph Williams
Written-By – David Paich (tracks: 1, 3, 4, 6 to 8, 10), Joseph Williams (tracks: 1, 2, 4, 6, 8), Steve Lukather (tracks: 4, 5, 7, 10)