- Steve Gerber
- Sal Buscema
- Vince Colletta
- Don Warfield [as Don W.]
- June Braverman [as Junie B.]; Gaspar Saladino (page 3); typeset (page 9)
- The Defenders [Valkyrie; Hulk [Bruce Banner]; Nighthawk [Kyle Richmond]; Doctor Strange [Stephen Strange]]; Elena; Elena's baby; Sons of the Serpent; Aragorn; Yellowjacket [Dr. Hank Pym]; Wong; Clea; Jack Norriss; Harold Holliman
- Sons of the Serpent reveal their agenda and battle the Defenders, capturing Dr. Strange, Valkyrie, Yellowjacket and Nighthawk.
Jack Norris name changed to Jack Norriss in this and all subsequent issues.
- Steve Gerber (replies)
- First Line of Dialogue or Text
- Dear Marvel, Defenders #20, coupled with...
Letters of comment from readers Dean Mullaney and Mary McGeehan.
Placed between pages 12 and 13 of the main sequence.
Also contains Marvel Value Stamp Series A #78 (the Owl).