Marvel Two-in-One #20 was published by Marvel Comics on October 1, 1976, as part of a series that began in 1974. Roy Thomas and Stan Lee write, and art comes from Frank Giacoia, Jack Kirby and John Romita. This 36-page issue features Thing, Human Torch, Mr. Fantastic, Invisible Woman and Watcher, among 16 characters cataloged on VerseDB.