| Issue | #20 |
| Published | December 1967 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | ? |
| Notes | 10053-712. |
| Pencils | ? (painted) |
| Inks | ? (painted) |
| Colors | ? (painted) |
| Letters | typeset |
| Reprinted | in Avontuur Classics (Classics/Williams, 1961 series) #1894 [cover] |
| Pencils | Joe Certa |
| Inks | Joe Certa |
| Pencils | Sal Trapani |
| Inks | Sal Trapani |
| Letters | Jon D'Agostino |
| Notes | Cover story. |
| Reprinted | in Mystery Comics Digest (Gold Key, 1972 series) #17 (May 1974) |
| Letters | typeset |
| Pencils | Andre LeBlanc |
| Inks | Andre LeBlanc |
| Letters | Ben Oda |
| Reprinted | in Mystery Comics Digest (Gold Key, 1972 series) #26 (October 1975) |
| Pencils | Luis Dominguez |
| Inks | Luis Dominguez |
| Letters | Ben Oda |
| Notes | Cover story. |
| Reprinted | in Mystery Comics Digest (Gold Key, 1972 series) #23 (May 1975) |
| Pencils | Win Mortimer |
| Inks | Win Mortimer |
| Letters | Ben Oda |
| Notes | Cover story. |
| Reprinted | in Mystery Comics Digest (Gold Key, 1972 series) #26 (October 1975) |
| Pencils | Joe Certa |
| Inks | Joe Certa |
| Letters | Ben Oda (story logo) |