Avengers Vol.1 #39
The newspapers write how Black Widow stole secret plans and escaped to Russia with them; Hawkeye is upset and walks into a trap, set by the Mad Thinker; Hawkeye is attacked and captured by Hammerhead, one of his "Triumvirate of Terror"; Goliath and the Wasp go to help but are captured by Piledriver, another member; Quicksilver and the Scarlet Witch are captured by Thunderbolt, the last member; The Mad Thinker then carries out his plans to steal all of Tony Stark's inventions.
First Printing: Apr 1967
Writers: Roy Thomas
Art: Don Heck and George Roussos [as George Bell]
Cover: Don Heck and George Roussos