Générique complet
Donovan's Brain
Lew Ayres
Dr. Patrick J. Cory
Nancy Reagan
Janice Cory
Gene Evans
Dr. Frank Schratt
Steve Brodie
Herbie Yocum
Tom Powers
Donovan's Washington Advisor
Lisa Howard
Chloe Donovan
James Anderson
Chief Tuttle
Victor Sutherland
Nathaniel Fuller
Michael Colgan
Tom Donovan
Peter Adams
Mr. Webster
HW
Harlan Warde
Treasury Agent Brooke
Shimen Ruskin
Tailor
John Hamilton
Mr. McNish (uncredited)
Don Brodie
Detective Who Follows Dr. Cory from Hotel (uncredited)
SK
Stapleton Kent
W. J. Higgins (uncredited)
Frank McLure
Man leaving Fuller's Office (uncredited)
WC
William Cottrell
Dr. Crane (uncredited)
Max Wagner
Station Agent (uncredited)
SH
Sam Harris
Man leaving Fuller's Office (uncredited)
PH
Paul Hoffmann
ML
Mark Lowell
WM
Walter Merrill
Charles Sullivan
KY
Katherine Yorke
