| Issue | #641 |
| Published | October 1955 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | ? |
| Notes | Indicia title is "Milton Caniff's STEVE CANYON, No 641." "Copyright 1955 by Field Enterprises, Inc." Code number is S.C.O.S #641-5510. |
| Characters | Steve Canyon; Tucker |
| Genre | spy; adventure |
| Pencils | ? (painting by the same guy who did Dell Jungle Jim #9.) |
| Inks | ? (painting by the same guy who did Dell Jungle Jim #9.) |
| Colors | ? (painting) |
| Letters | typeset |
| Notes | Indicia title is "Milton Caniff's STEVE CANYON, No 641." "Copyright 1955 by Field Enterprises, Inc." Code number is S.C.O.S #641-5510. |
| Letters | typeset |
| Notes | Inside front cover; black and white. Full page of Dell's "A Pledge to Parents," |
| Characters | Steve Canyon; Tucker |
| Synopsis | Steve Canyon is sent to the Philippines as an undercover agent to keep enemy spies from observing the results of a test of a "T-Bomb" on the Pacific island of Ebee. |
| Genre | spy; adventure |
| Script | Milton Caniff |
| Pencils | Ray Bailey; Milton Caniff (see notes) |
| Inks | Ray Bailey; Milton Caniff (see notes) |
| Notes | Pencils and inks credits for this sequence from Alberto Becattini (May 14, 2007). Milton Caniff only drew and inked Steve Canyon's heads in the story. Story continues on inside back cover in black and white and concludes on the back cover in color. Atomic bomb explosion depicted on inside back cover as part of story. |