Terrific Comics #4

This issue contains at least two stories: one featuring submarine combat where heroes named Boomerang and Diana battle enemy forces underwater and must bring their captured submarine to the surface before the Navy pursues them, and another involving a character named Blake who confesses to murdering a man named Thompson and robbing him of diamonds, throwing the body in a frozen lake before being apprehended by authorities. A third story set in a sanitarium follows Dr. Barton and a Hamilton girl named Dorothy, where an explosion in the boiler room beneath Dorothy's room rocks the facility, leading to a fire that forces evacuation of the patients.