Ditko credits supplied by Nick Caputo and Mark Elstob.
Second appearance of The Eel; previous appearance in issue #112 (September 1963); Eel has a 2-panel cameo in Fantastic Four Annual (Marvel, 1963 series) #3 (1965), then returns in X-Men (Marvel, 1963 series) #22 (July 1966). Story not reprinted in Marvel Tales run.
Text story with illustration.
This is the fourth appearance of Baron Mordo; his last chronological appearance is in issue #114 (November 1963); he next appears in issue #121 (June 1964).