Mary Marvel#26(1948)

Georgia Sivana has invented a “Midget Atomic Bomb” that can only kill roughly 5,000 people at once and goes to test it out in the small town of Berryville and takes off there in her green Rocket-Ship, burying it somewhere near the center of town and puts a small TV transmitter in next to it, then dumps trash on the spot where it is. The next day, the Mayor of Berryville gets news they're being threatened with a random nuclear explosion somewhere in town and that it's on any TV set to #75. News of it soon travels to Mary Batson, who hears it on the radio and calls SHAZAM to become Mary Marvel and go investigate why Georgia is threatening a small town or why she warned them beforehand. Instead, Georgia is just using to rob every place in town that's been abandoned, but Mary Marvel punches her over when she tries to dump them in her Rocket-Ship. Mary Marvel decides she's going to lean on Georgia until she tells her where the bomb is, but Mary Marvel is distracted by a crying child lost in the scourge of Berryville. She reunited the boy with his family while Georgia manages to finish packing all her stolen goods, only for Mary Marvel to grab the tail of her Rocket-Ship, holding it from taking off. Mary Marvel realizes she can intimidate Georgia to tell her where the bomb is by dragging her around town until she finds it with three seconds to go. However, Mary Marvel points out that Georgia failed there too: the Midget Atomic Bomb is a useless dud!