Captain America (1968 series) #108

As the story opens, Captain America is enjoying a workout designed by Tony Stark for SHIELD: dodging and swatting deadly missiles. His SHIELD keeper appears with an assignment … which Cap doesn't want to take, since he wants a life of his own instead of being on call all the time. He changes his tune quickly when he learns that the mission involves the disappearance of his beloved Sharon Carter, who went missing while delivering important info on Project Fireball. The agent hands Cap the tracker for her homing device and Cap heads out on the trail.

Elsewhere, we find Sharon glued to a table, a prisoner of the Trapster, who wants to learn the secret of Project Fireball. At this moment, Cap arrives at the condemned building the homing signal led him to. He knows he’s in the right place when a paste trap goes off, and he also knows who he will be facing. Cap miscalculates and grabs onto a paste-smeared bar. The Trapster appears, taunting the helpless hero—but Captain America is never helpless: he swings, kicking the villain across the room, then breaking the bar and using it as a weapon. The Trapster drops Cap through a trapdoor and glues him to a spinning table, to force Sharon to reveal the secret, but Cap breaks loose from the strangely weak paste and batters his foe. The villain drops a plastic tube over Cap and fills it with paste, and taunting him, reveals that he was hired by the Red Skull to sabotage the SHIELD project. Cap then shocks him by breaking out of the paste and punching his lights out, knocking the baddies into his own paste-pot. When Cap finds Sharon glued to the table he is startled to discover she’s an LMD; the real Sharon was orchestrating everything from behind the scenes, even diluting the Trapster’s paste to aid Cap, as part of a plot to get the villain to reveal his employer’s name. The Trapster has escaped but Cap and Sharon take the time to share a kiss.