(Mary Marvel (Fawcett) #4) - Mary heard that Slippery Slyke were Hugo on a crime spree, and confronted them, but when she said Shazam! she didn't turn into Mary Marvel. Shazam's spirit told her he lost his powers one day in every thousand years, so she couldn't become Mary Marvel for another 24 hours. Mary made a costume and lured the crooks into a trap. She tried to convince them she had powers by launching bricks at them, but they were wise to her. They tied her up and shot at her just as the 24 hour limit expired, and Mary turned into Marvel and defeated the crooks.

(Mary Marvel (Fawcett) #4) - Mary captured Dangerous Dan, who'd disguised himself as the wealthy Pierpont J. Vanderpool in order to rob his house. Mary knew he got his disguise from Mr. Beest's mask shop, but when she got to the store Beest was in disguise, baffling Mary. Beest gave a beauty disguise to a girl so she could win a beauty pageant. Mary awarded the prize at the pageant and saw Beest trying to take the prize money from the winning girl, so she apprehended him.

(Mary Marvel (Fawcett) #4) - Mary pursued a mugger into Mr. Goodhart's candy store, but the kindly shopkeeper got a promise from the crook that he'd reform and hid him from Mary. Mary stayed in the shop and watched Goodhart be generous to children and a homeless man, but noticed people took advantage of his kindness. Mary stayed outside the shop, and saw the crook Goodhart protected try to rob him. Mary apprehended him, but when Mr. Goodhart's landlord tried to evict him for falling behind on rent the crook paid the difference. Goodhart's goodness rubbed off on him, and he turned himself over to Mary.

(Mary Marvel (Fawcett) #4) - Mary witnessed Gus Gaylord and his trained troupe of seals get evicted by their landlady, and promised to find them a new place to live. The seals got into all sorts of trouble, causing traffic jams and stealing from a fish-peddler, but Mary kept anyone from getting hurt. She saw the good in the seals when they helped her foil a bank robbery, and she found an apartment willing to rent to Gus.

(Marvel Family (Fawcett) #1) - Sterling Morris got a report of an identified object from deep space approaching Earth at the speed of light, and asked Billy to cover the story. Billy visited an observatory, but the astronomers were baffled. The object turned out to be Black Adam, who’d been flying towards Earth for thousands of years. He arrived and proclaimed that he would conquer the planet. Captain Marvel and Marvel, Jr. Confronted him, but their powers were too evenly matched and they fought to a standstill before Adam decided to retreat for the moment. The Marvels changed back into Billy and Freddy to see Shazam and ask him if he knew anything about Black Adam, whose powers were so similar to theirs. Unbeknownst to them Black Adam was following them. Shazam told the boys that thousands of years ago in ancient Egypt he made Teth-Adam into Mighty Adam, his first champion. Adam’s power corrupted him, and after killing the pharaoh he declared himself ruler of Egypt. As punishment Shazam renamed him Black Adam and banished him to the furthest star in the universe, never realizing he’d be determined enough to find his way back to Earth. Shazam vanished and Black Adam tied up Freddy and Billy, gagging them so they couldn’t say the magic words that gave them power. Mary Marvel and Uncle Marvel realized the boys were missing, and made their way to Shazam’s throne room only to discover their friends trussed up. Mary fought Black Adam, while Uncle Marvel freed the boys and summoned Shazam, asking him how to defeat Black Adam. Shazam told Uncle Marvel he had to get Black Adam to say his name. Uncle Marvel told the Marvel Family that Black Adam was too powerful for them to defeat and said he should join their family. He annoyed Black Adam by mispronouncing Shazam’s name until Adam spoke the magic word, turning him back into Teth-Adam. His mortal form was 5,000 years old, and he rapidly turned into an elderly man before decaying into a skeleton. Shazam thanked the Marvel Family for destroying his worst mistake, and said he was glad he entrusted his power to good people.

(Marvel Family (Fawcett) #4) - Billy invited Mary and Freddy to WHIZ to watch the station's latest program, "The Witch's Hour," in which Ellie Hawkins told scary stories. Three witches flew into the studio on a broomstick and abducted Ellie, so Billy, Mary and Freddy transformed into the Marvel Family and went in pursuit of them. The witches lost the Marvels in a stormcloud, so the Marvels split up to cover more ground to find them again. Captain Marvel, Jr. found their cave, but the witches cast a spell forcing him to stand on his head. He broke the spell by turning back into Freddy Freeman, and the witches grabbed him and tried to turn him into a bat. Mary saw the lightning bolt that accompanied Freddy's transformation, and rushed to the cave. She knocked out two of the witches, but the third fled on her broomstick with Ellie in tow. Captain Marvel caught her and rescued Ellie, but the Marvels couldn't agree on what to do with the witches. Ellie admitted that she was a witch and used to be in their coven before striking out for the big city to make her name in radio. She asked the Marvels to find her fellow witches a productive job, so Billy set them up as a singing quartet, and the reformed witches found instant fame at WHIZ.

(Marvel Family (Fawcett) #10) - On the Marvel Family Round-Table television program Captain Marvel, Captain Marvel, Jr, Mary Marvel and Uncle Marvel talked about the threat Sivana posed to the world. Sivana met with his children Sivana, Jr. and Georgia Sivana, saying that since they’d failed to take the Marvel Family down on their own they needed to team up as the Sivana Family. Sivana developed a machine to destroy the Marvels, but when he tried to test it by measuring the voltage of Shazam lightning the power surge broke the meter. Sivana knew he needed a power source greater than an atomic bomb to make his machine work. Sivana, Jr. Had uncovered manuscripts from ancient Atlantis about protium, an element even more powerful than plutonium. Protium was a radioactive element that turned into neutrium after 10,000 years and electrium after another 10,000. Sivana wanted samples of all three elements but knew they’d need to time travel. Fortunately for him he knew all the Marvel Family’s secrets and they could reach the future and the past from the Rock of Eternity. The Sivana Family flew their rocketships faster than the speed of light to reach the Rock, and Shazam alerted the Marvel Family. Mary Marvel followed Georgia Sivana to the Atlantis of 8,000 B.C. Chal-Patzun was the Atlantean professor who discovered protium and Georgia met up with him, learning that he’d correctly predicted Atlantis was about to sink,. Chal-Patzun showed her his machine powered by protium that he said could save Atlantis, and she hit him over the head with a stick. Mary Marvel arrived in time to restrain Georgia. Chal-Patzun explained that Atlantis was doomed, but after 20,000 years the protium in his machine would be changed into electrium which could be used to raise the city again and restore it to its’ former glory. Chal-Patzun had sent his son away from Atlantis with the secrets of how to operate the machine, and his son would pass that knowledge on to his children and his children’s children. Mary Marvel changed back into Mary Batson to see if her magic lightning could speed up the change of protium to electrium to no avail. The cataclysm hit Atlantis and the city sank, and Georgia managed to restrain Mary, steal a vial of protium and escape in her rocketship with Mary as her prisoner. In the present Sivana kidnapped Dr. Charles Patterson, the descendant of Chal-Patzun, and forced him to show Sivana were Atlantis was under the waves. Captain Marvel pursed him underwater, but Sivana used a giant electric eel to shock Marvel and turn him back into Billy Batson. Sivana took a vial of neutrium from Chal-Patzun’s machine, fatally shot Dr. Patterson and left with Billy as his prisoner. In the future of year 12000 Chass Passon, Chal-Patzun’s descendant, used the remaining electrium to finally raise Atlantis. Sivana, Jr. Clocked him with a wrench, but Captain Marvel, Jr. Ran him off. Marvel, Jr. Introduced himself to Passon, but by saying Captain Marvel he changed back into Freddy Freeman. Sivana, Jr. Knocked him out with a rock, took a vial of electrium and returned to the present with Freddy in tow. Sivana powered his machine, which created a cloud of free electrons around Earth, deflecting the Shazam lightning when the Marvels said their magic words. Sivana showed off his newly built palace, confident that without the Marvel Family to thwart him his family would assume their rightful role as rulers of the universe. The Sivana Family let the Marvels loose on the grounds to hunt them for sport, but billy was wily enough to evade them and make his way to Sivana’s machine, depowering it. The Marvels said their magic words, wrecked the machine, and defeated the Sivanas.

(Mary Marvel (Fawcett) #17) - Mrs. Upcreek visited Mary and Uncle Marvel at Shazam, Inc and begged them to find her dog Brutus, promising to reward them handsomely. She wrote a description of Brutus on a piece of paper, but a gust of wind blew it out the window. Uncle Marvel said he didn’t need a description anyway since a dog named Brutus would certainly be big and tough. Mary and Uncle visited the dog pound first, and after Uncle Marvel accidentally let the dogs all escape Mary had to round them up. They checked the personal ads to see if anyone found a lost dog and discovered a note from dog-nappers who demanded a ransom for “B.” Uncle Marvel got some phony money from his office and met Barky Bowser and his gang. They saw through the ruse and started to rough up Uncle Marvel, so Mary had to come to his rescue. Barky sicced his watch dog on Uncle Marvel, giving them a chance to flee. The watch dog led the Marvels to another one of Barky’s hideouts and they made short work of the crooks. They found the stolen dog and returned him to Mrs. Upcreek only to learn that the dog, named Bonzo, belonged to her neighbor. Bonzo went home and Uncle Marvel grabbed some fruit from a fruit bowl to think the case over. Brutus, a Chihuahua, had fallen asleep in the fruit bowl, and gave Uncle Marvel a nip. Mrs. Upcreek was delighted to be reunited with her pet.

(Mary Marvel (Fawcett) #24) - The infamous criminal Nightowl could see in the dark but was blinded by light. Under the alias Henry Tibbs he rented a room in Mrs. Bromfeld’s house and disguised himself with bandages, claiming to be a burn victim. During the day he posed as a blind beggar to case places he planned on robbing. He had no clue that Bromfeld’s daughter Mary Batson was the superhero Mary Marvel. Mary and Nightowl were both in attendance for a television show showcasing valuable jewels from a museum. Nightowl used his darkflash gun to blind the television announcer and steal the jewels. Mary went into action as Mary Marvel, but he blinded her too and then changed into his blind man disguise. Mary nearly caught up with him when he robbed a factory of black diamonds, but he blinded her again. She changed back into Mary Batson so the lightning that transformed her would banish the darkness, but Nightowl took advantage of the situation, knocking Mary out and tying her to a pressser machine. She recovered in time to turn back into Mary Marvel and smash the machine. Nightowl left behind his beggar disguise, giving Mary a lead on finding him. Nightowl broke into the city power plant, cutting off the electrical grid so he could rob at will. Mary Marvel realized that “Henry Tibbs” always sat in darkness and finally figured out that he was the Nightowl. She confronted him in his boarding room and knocked him out with one punch.

(Marvel Family (Fawcett) #53) - Professor Martin Mason was an atomic scientist greatly worried about the future of Earth. He was concerned with a future shortage of metals, and invented an expander ray that could enlarge inanimate matter to create more raw resources of metal. Before long he decided the greatest threat to the future of humanity was overpopulation, so he tinkered with his expander ray so it could enlarge the size of the Earth and every inanimate object tenfold and hopefully supply the needs of humanity until the end of time. His expander ray had unintended consequences, forcing the Marvel Family to go into action. Billy Batson finished his newscast when the ray hit, and Miss Baker, who provided music for his show fell from her now gigantic keyboard organ, and he had to change to his heroic identity of Captain Marvel to save her. Freddy Freeman shrunk while hawking newspaper, and had to change into Captain Marvel Jr. to save a driver when his car grew to large for him to control. Mary Batson saved her neighbor Mrs. Barstow from being crushed by her phone by turning into Mary Marvel. The Marvels met up, and stopped a jailbreak when the prisoners ran between the bars of their cell, and the Marvels locked the prisoners in the warden's desk for the time being. Mason's machine was too large for him to pull the lever that turned it off, so he sent out a radio broadcast asking for the Marvel Family's help. They used their superstrength to pull the lever, and Mason admitted he'd made a big mistake, and would reverse the ray to return Earth to its' normal size. He left the ray in reverse for too long, causing the Earth to rapidly shrink, and the Marvels had to evacuate Fawcett City before the residents crushed their newly tiny city by accident. Mason was again in a fix, because his underground lab where the ray was was now too small to reach. The Marvels carefully removed the roof of the underground cabin and flicked the lever again, restoring the world to normal. They destroyed the ray lest it cause more chaos, and took Mason to the authorities to see if the courts would choose to punish him for his grievous error. Captain Marvel chided Mason that he was wrong to tamper with the scheme of things.