Cover is variation of Strange Tales #167 (April 1968). No direct relation to either story inside. Fury and Shield agents would not wear black jumpsuits until Strange Tales #156 (May 1967).
Part 4 of 5. First Jack Kirby-dialogued Marvel Comic of the 1960's. The pen-radio Fury uses is similar to the one regularly used by agents on THE MAN FROM U.N.C.L.E. tv series. This is the 2nd time Fury smashed a glass viewport on the Heli-Carrier, the 1st time being in STRANGE TALES #135 (August 1965).
Part 5 of 5. Secret Empire storyline continues from Hulk story in TALES TO ASTONISH #83; then concludes in Sub-Mariner stories in TALES TO ASTONISH #83-85 (September-November 1966). "THEM" is revealed to be a cover-name for HYDRA; as they supplied The Fixer who appeared in STRANGE TALES #141-143 (February-April 1966), this means HYDRA has never really gone away at this point! It's revealed that Count Royale was not killed in the massive explosion, in the Captain America story this month's TALES OF SUSPENSE #82 (October 1966), as Cap winds up facing one more of A.I.M.'s artificial androids. Two pages edited out of story.