- Script
- Roy Thomas (credited); Gerry Conway (plot, see notes)
- Pencils
- Herb Trimpe (credited)
- Inks
- Sal Buscema (credited)
- Colors
- ?
- Letters
- Jean Simek (credited as Jean Izzo)
- Genre
- superhero
- Characters
- Hulk [Bruce Banner]; Thunderbolt Ross; Glenn Talbot; Xeron (villain, introduction); Klatuu (villain, introduction); Abomination (cameo); Betty Ross (cameo); Jim Wilson (cameo)
- Synopsis
- Hulk interferes in a battle between Xeron the space hunter and his quarry, the giant energy beast Klatuu, and is taken into space as a slave for his troubles.
- Reprints
- in The Mighty World of Marvel (Marvel UK, 1972 series) #101 (September 7, 1974) [pages 1-11], #102 (September 14, 1974) [pages 10, 12-20; pages 12 and 13 of the original are each numbered half-pages that are combined to form page 2 of the reprint; page 14 which is page 3 of the reprint is switched with page 15, which is page 4 of the reprint]
- in Spindelmannen (Red Clown, 1974 series) #5/1975 (1975)
- in Hulk (Arédit-Artima, 1976 series) #7 (février 1978) [N&B [B&W]]
- in Marvel Treasury Edition (Marvel, 1974 series) #20 (1979)
- in Hulk el Hombre Increíble (Editorial Novaro, 1980 series) #27 (4 de mayo de 1981) [Edited, minus 4 pp]
- in Biblioteca Marvel: Hulk (Planeta DeAgostini, 2004 series) #14 (Octubre 2004)
- in Essential Hulk (Marvel, 1999 series) #3 (April 2005)
- in Incredible Hulk Epic Collection (Marvel, 2015 series) #4 - In the Hands of Hydra (2019)
Conway plot revealed in the letters section of issue # 140.
- Script
- Roy Thomas
- Letters
- typeset
- First Line of Dialogue or Text
- Dear Stan, Roy, and Herb, Hulk #131 was by far, to at least, on the most fascinating issues ever put out in this certain, in terms of story and character.
- Feature Logo
- Green Skin's Grab-Bag
letters of comment from Gary Chun, Honolulu Hawaii; Bill Szymonski, Tallmadge Ohio; and Michael L. Kuhne, Offutt Air Force Base Nebraska