Colonel #1 (segment "To Serve Man)
Oscar the Butler
Dr. Orva
Professor
Larkin
Rhodes
Doctor (uncredited)
Specialist #1
Professor Victor Newcole
Mr. Coleman
John T. McGrane
Major Hiram Prescott
Buck Slavin
Col. Bert Wayne
District Attorney Milton
Captain
Dr. Wyndham
Benjamin Frank Mahoney, President Ryan Airlines Co.
General Timberidge
Sen. Black