| Issue | #20 |
| Published | November 1969 |
| Cover Price | 0.25 USD |
| Pages | 52 |
| Editing | Sam Schwartz |
| Genre | Superhero |
| Pencils | Chic Stone |
| Inks | Chic Stone |
| Genre | Superhero |
| Pencils | Chic Stone |
| Inks | Chic Stone |
| Notes | origin of Dynamo recapped |
| Pencils | Reed Crandall |
| Inks | Wally Wood |
| Notes | vs. Iron Maiden |
| Reprinted | from T.H.U.N.D.E.R. Agents (Tower, 1965 series) #4 |
| Pencils | John Giunta |
| Inks | Wally Wood |
| Notes | vs. Vibraman 1st |
| Reprinted | from T.H.U.N.D.E.R. Agents (Tower, 1965 series) #3 |
| Script | Steve Skeates |
| Pencils | Mike Sekowsky |
| Inks | Frank Giacoia |
| Notes | origin and 1st appearance of Lightning. vs. Baron von Kampf 1st |
| Reprinted | from T.H.U.N.D.E.R. Agents (Tower, 1965 series) #4 |
| Pencils | Wally Wood |
| Inks | Dan Adkins |
| Notes | Last two pg are b&w on back covers. |
| Reprinted | from T.H.U.N.D.E.R. Agents (Tower, 1965 series) #3 |