Acting (Colonel #1 (archive footage))

Acting (Oscar the Butler)

Acting (Dr. Orva)

Acting (Professor)

Acting (Munsey (uncredited))

Acting (Larkin)

Acting (Doctor (uncredited))

Acting (Rhodes)

Acting (Specialist #1)

Acting (Professor Victor Newcole)

Acting (Mr. Coleman)

Acting (John T. McGrane)

Acting (Major Hiram Prescott)

Acting (Buck Slavin)

Acting (Col. Bert Wayne)

Acting (District Attorney Milton)

Acting (Captain)

Acting (Dr. Wyndham)

Acting (Benjamin Frank Mahoney, President Ryan Airlines Co.)

Acting (General Timberidge)

Acting (Eloise's Lawyer)

Acting (Sen. Black)