Men of Mystery Comics #104

In "null," Bob, Joyce, and Harry follow Dawson to his sea-based HQ, where Hydroman takes on the enemy alone—only to later race to rescue Joyce and Harry from the grasp of mysterious oriental invaders.

In "null," violinist John Wallace is thrust into a deadly mystery when he defends an aging violin maker whose secret varnish formula grants near-magical craftsmanship. After being revived by the man’s eerie "Pipes of Peace," Wallace takes up the mantle of the Music Master, determined to avenge his mentor’s murder and protect the legacy of the instrument.

In "null," the Young Defenders witness a brutal murder and enlist Don Wright to trace a license plate, uncovering a trail that leads to inventor Silas Green and his deadly creation, the Yellow Death. With Captain Freedom now on the case, the hunt for the truth begins—before the next victim falls.

In "null," Jo finds herself caught between two forces when Mars bets Ceres that The Heap—once transformed into a peaceful being—will return to its destructive nature if placed in conflict. Now wielded by ruthless men seeking the legendary Black Tashmal, The Heap becomes a weapon in a brutal campaign that shatters sacred traditions and ignites tribal war, all while the true cost of its power begins to unfold.

In "null," Zoro and Hale find themselves stranded in the prehistoric era after a mysterious mishap, facing off against both ancient tribes and a charging mastodon before being returned to the present. Back in their own time, Zoro answers the call to join the army, while Hale is dispatched to Washington with Elton to develop a new explosive.