“The Secrets of the Blackhawk Time Capsule”
The Blackhawks decide to bury the plans for their super-secret weapons in a time capsule to be opened only after their deaths, but the Schemer learns of this and digs it up, building one of the super-weapons for himself.
“The Sunken Island!”
A sunken island emerges from the sea, where the Blackhawks find the descendants of a 13th century Chinese shipwreck who live underground, in two warring factions.
“The Super Blackhawk”
The Mole unleashes his atomic disintegrator beam on Blackhawk, but a malfunction gives him temporary super-powers instead of destroying him.