"Captain America Joins the Avengers"
Reprinted from Avengers (Vol 1) #4.
"The Fantastic Origin of the Red Skull"
Reprinted from Tales of Suspense (Vol 1) #66.
"Lest Tyranny Triumph"
Reprinted from Tales of Suspense (Vol 1) #67.
"The Sentinel and the Spy"
Reprinted from Tales of Suspense (Vol 1) #68.