Henry O'Neill as Dr. Everett Colner

Morris Ankrum as Lt. Pat McKay

Arthur Space as Burton Caighn Jr.

Paul Guilfoyle as Dudley Badger

Dorothy Adams as Mrs. Mary Abbott (uncredited)

Paul Langton as Peter Selkin (uncredited)

William Tannen as McKay's Assistant (uncredited)

Charles Thompson as David Ranklin (uncredited)

John Vosper as Dr. Elton Parkson (uncredited)

Jacqueline White as Jean Smith (uncredited)