| Issue | #51 |
| Published | June 1966 |
| Frequency | monthly |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Characters | Mr. Fantastic; the Thing; Invisible Girl |
| Genre | superhero |
| Pencils | Jack Kirby |
| Inks | Joe Sinnott |
| Reprinted | in Marvel Masterworks: The Fantastic Four (Marvel, 2003 series) #6; in Fantastic Four Omnibus (Marvel, 2005 series) #2; in Fantastici Quattro, I (Editoriale Corno, 1971 series) #47 |
| Characters | Fantastic Four [Mr. Fantastic; the Thing; Invisible Girl; Human Torch [Johnny Storm]]; Wyatt Wingfoot; Whitey Mullins; Sam Thorpe |
| Synopsis | An unnamed scientist gives himself the powers and appearance of the Thing and goes to the Baxter Building, planning to kill Reed. However, an accident results in him saving Reed's life and perishing in the Negative Zone. |
| Genre | superhero |
| Script | Stan Lee |
| Pencils | Jack Kirby |
| Inks | Joe Sinnott |
| Letters | Artie Simek |
| Reprinted | in Marvel's Greatest Comics (Marvel, 1969 series) #38; in Marvel Treasury Edition (Marvel, 1974 series) #11 [edited]; in Marvel Masterworks: The Fantastic Four (Marvel, 2003 series) #6; in Fantastic Four Omnibus (Marvel, 2005 series) #2; in Fantastici Quattro, I (Editoriale Corno, 1971 series) #47 |