- Stan Lee; Jack Kirby (co-plot)
- Jack Kirby
- Joe Sinnott
- Stan Goldberg
- Sam Rosen
- Fantastic Four [Mr. Fantastic; Invisible Girl; the Thing; Human Torch [Johnny Storm]]; Silver Surfer; Inhumans [Crystal; Karnak; Black Bolt; Medusa; Gorgon; Triton; Lockjaw]; Wyatt Wingfoot; Sam Thorpe
- The Sandman attacks the FF. During the battle, Reed is pulled into the Negative Zone and feared dead.
Kirby's co-plot credit is widely acknowledged by Lee and Kirby in numerous interviews. Here the credit reads "Extravagantly executed with ebullient erudition by: Stan Lee and Jack Kirby."
Stan Goldberg credit based on a note on one of the original artboards (seen here: http://www.tcj.com/im-gonna-open-sealed-door-to-negative-zone/ ) as seen by Trevor Ashfield.