| Issue | #21 |
| Published | 8 July 1967 |
| Cover Price | 9d |
| Pages | 40 |
| Editing | Alf Wallace [as Alf]; ? [as Bart]; Stan Lee (original editor) |
| Characters | Crimson Dynamo |
| Genre | Superhero |
| Pencils | Jack Kirby |
| Inks | Paul Reinman |
| Reprinted | From Tales Of Suspense (1959 series) #52 (April 1964) |