When a UFO fires on Moscow because Howard can't keep his finger off the button, Peggy and the team go underground...but which one of them is already undercover? Woodrow McCord fights a bear! Peggy punches Howard in the face!

Howard proves (yet again) that he can't drive spaceships. Peggy and the gang crash headlong into the Hydra-run gulag outpost just as a ragtag crew of Soviet scientists opens a portal between worlds!

The truth behind S.I.N. is exposed! Not everybody gets out of Russia in one piece! Peggy and the gang face impossible decisions with grisly consequences in this rocketing conclusion!

Tying into the explosive events of ORIGINAL SIN, see an untold story from the origins of the Marvel Universe! After an alien energy source is discovered in Russia in the early 1950s, it's up to Peggy Carter and Howard Stark to find out what happened. But a newly risen terrorist group going by the name Hydra also happens to be on the hunt for their own nefarious purposes! It's only when a mysterious operative going by the name of Woodrow McCord enters the picture to aid Peggy and Howard that they realize just how far some people are willing to go to keep the Earth safe! Operation S.I.N.: Agent Carter TPB is a tie-in to ABC's hit TV show, Marvel's Agent Carter! COLLECTING: Operation S.I.N. 1-5, Captain America and the First Thirteen 1