Starman in "Adventure of the Ring of Hijackers"
Starman vs. Baron X and his criminal minions.
Shining Knight in "The Pirate Submarines"
The Shining Knight takes on crooks who flood a town and then rob it underwater.
Hourman in "The Magic Carpet"
Hourman vs. Dodo and Globe-O, criminal dwarfs who commit crimes with a flying carpet.
Steve Conrad in "Treasure of the Galleon"
The Federal Men in "Hot Metal Death"
Paul Kirk in "The Body on the Doorstep"
Sandman in "The Adventure of the Murderous Bookshop"
The Sandman pursues criminals who are after the last (unpublished) novel by Edgar Allen Poe.