Adventure Comics (1938) 71-A

Starman in "The Invaders from the Future"
Starman vs. The Unknown, who is actually the Light in disguise.

Shining Knight in "The Stronghold of Savarr"

Steve Conrad in "Jungle Search"

Hourman in "The Stars Look Down on Murder"
Hourman vs. Dr. Destiny, a radio astrologist seeking revenge on those who fired him. The real criminal however is fellow board member trying to kill his fellows and blame the astrologer.

Paul Kirk in "Crime Strikes at Home"

Sandman in "Adventure of the Road of No Return"
The Sandman vs. Professor Sah, a criminal with a ray that increases the effect of gravity on objects and people.