First full appearance of Baron Zemo, and first appearance of the second Black Knight in "Masters of Evil!", Baron Zemo, the man behind the cause of Bucky's death discovers that Captain America is still alive; Collecting together the Black Knight, Radioactive Man and the Melter, the Masters of Evil are formed; While the Masters of Evil spray the city with 'Adhesive X', a powerful glue for which there is no solvent, the Avengers attack; Captain America and Giant-Man get trapped by the adhesive and the Avengers withdraw to try and find a solution for it; Wasp remembers that a criminal behind bars called Paste-Pot Pete might be able to help; After receiving the solution they free Captain America and Giant-Man, and attack the Masters again. Special bonus: The letter column in this issue leads off with a letter from Buddy Saunders, the owner of MyComicShop. Oh, for the halcyon days of our callow youth! In the letter Buddy tells Stan and Jack that Avengers #4, with the return of Captain America, was one heck of a great issue. Time has certainly proven him right!
