The story title is taken from the cover blurb.
| Script: | John Douglas (signed) |
| Pencils: | |
| Inks: | Enrico Bagnoli (p. 1-4) Antonio Canale (p. 5-6) |
| Colors: | ? |
| Letters: | ? |
in Planet Comics (Publications Services Limited, 1949 series) #2 ([circa August 1949])
in Strange Worlds (Malibu, 1990 series) #1 (November 1990) [in black and white]
in Thrilling Science Fiction (AC, 1998 series) #2 (1999)
in Golden-Age Science Fiction Treasury (AC, 2008 series) #1 (2006)
in Men of Mystery Comics (AC, 1999 series) #85 ([April] 2011) [in black and white]The inking varies tremendously on this episode. They are especially simplified on page five.
| Script: | Thornecliffe Herrick (house name) |
| Pencils: | ? [as J. Bixby] |
| Inks: | ? [as J. Bixby] |
| Colors: | ? |
| Letters: | typeset |
| Script: | |
| Pencils: | Frank Doyle (see Notes) |
| Inks: | Frank Doyle (see Notes) |
| Colors: | ? |
| Letters: | ? |
Doyle provides panels two, three and the final panel and the story is revamped to eliminate about a page and a half of the original story.
in Planet Comics (Publications Services Limited, 1949 series) #2 ([circa August 1949])
in Planet Comics (Cartoon Art, 1950 series) #[nn] ([1950])
in America's Greatest Comics (AC, 2002 series) #2 (2002)
in Golden Age Men of Mystery Star Studded Spectacular (AC, 2006 series) #1 (2007)
in Gwandanaland Comics (Gwandanaland Comics, 2016 series) #366 - Mysta of the Moon ([March] 2017)Dirk Garro erroneously refers to Mysta as "Technician 106" throughout this story.