A scientist who is working on a cure for influenza is victimized by his unscrupulous boss, who releases the vaccine before it's ready, resulting in the death of the scientist's son.
| Actor | Role |
|---|---|
 Lon Chaney Jr.Jeff Carter | Jeff Carter |
 Brenda JoyceMary Carter | Mary Carter |
 J. Carrol NaishRoger Graham | Roger Graham |
 Milburn StoneStevens | Stevens |
 Lloyd BridgesDave Curtis | Dave Curtis |
 Addison RichardsDr. Williams | Dr. Williams |
 Mary GordonMrs. O'Connor | Mrs. O'Connor |
 Christian RubMr. Moore | Mr. Moore |
 George ChandlerHarper | Harper |
 Jody GilbertMrs. Todd | Mrs. Todd |
| GGregory MarshallTommy Carter | Tommy Carter |
 Wilton GraffBrandon | Brandon |
 Ian WolfeFrederick | Frederick |
 Jack NortonJack | Jack |
 Francis McDonaldHernandez | Hernandez |
 Beatrice RobertsNot listed | Not listed |
 Wheaton ChambersNot listed | Not listed |
 Leyland HodgsonNot listed | Not listed |
 William DesmondPeanut Vendor (uncredited) | Peanut Vendor (uncredited) |
 Jack PerrinNot listed | Not listed |