Dr. Sigi was Hanfred Sapp, a mad Nazi scientist in a green skull mask, who planned on injecting a rabies germ into Americans to turn them into madmen.
| Alias Dr. Sigi |
| Real Names/Alt Names Hanfred Sapp |
| Characteristics Nazi Party, Scientist, Chesler Universe, Skeletal, World War II Era |
| Creators/Key Contributors Lou Fine |
| First Appearance Yankee Comics #2 (November 1941) |
| First Publisher Chesler / Dynamic [CB+] [DCM] [GCD] |
| Appearance List Yankee Comics #2 |
| Sample Read Yankee Comics [DCM] [CB+] |
| Description Dr. Sigi was Hanfred Sapp, a mad Nazi scientist in a green skull mask, who planned on injecting a rabies germ into Americans to turn them into madmen. |
| Source ○ |
