The Fourth Sleeper
SL-4
38 issues
The Fourth Sleeper, also known as SL-4, has appeared in 38 comics from Marvel Comics since 1968. The most recent catalogued appearance dates to 2024. Team affiliations include Skeleton Crew and Sleepers. Most catalogued appearances come from Captain America.
Real Name
SL-4
Hero Name
The Fourth Sleeper
Publisher
First Appearance
Powers
Super Strength, Flight, Blast Power, Weapon Master, Gadgets, Density Control, Claws, Chemical Secretion
Teams
Teammates
Appears alongside
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