Captain America Vol.1 #101
Cap faces the Red Skull and the fourth Sleeper in "When Wakes the Sleeper!", script by Stan Lee, pencils by Jack Kirby, inks by Syd Shores; Captain America attacks a jeweler who he recognizes to be Nazi war criminal Werner Von Krimm; Nick Fury stops the fight and lets Krimm go, much to the Captains chagrin; Red Skull is hiding out at a secret base in the Florida Keys with henchmen, looking to awaken a fourth Sleeper robot; Von Krimm has the key to activate that robot.
Printed: May 1968
Writers: Stan Lee
Art: Jack Kirby and Syd Shores
Cover: Jack Kirby, John Romita Sr., and Syd Shores