Wasn't this clever, kids? We left 1952 in our Time Ship and invaded 1960! In short order, with our Plutonian allies, we conquered all the planets except Earth! Heh Heh Heh! 
The Marvel Family #75 is an issue of the series The Marvel Family (Volume 1) with a cover date of September, 1952.
Synopsis for The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter One: Peril Over Planet Prep"
The Marvel Family use Dexter Knox's device to see into 1960, where Earth has colonized the Solar System, and see the Sivana Family attacking spaceships from Earth. They travel there using the Rock of Eternity. The Sivanas have time-travelled to 1960 and with their Plutonian allies hope to invade the Solar System. The Marvel Family fights the Sivanas, who use smoke clouds to escape them. Their allies' ships use the same methods. Dexter Knox sees the problem and uses a time-pill to travel there. He says they should make a Planet Prep, training an army to defeat the Sivanas ships. The Sivanas push a meteorite towards the Academy, but the Marvels stop it.
Appearing in The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter One: Peril Over Planet Prep"
Featured Characters:
Supporting Characters:
Antagonists:
- The Sivana Family
Other Characters:
Locations:
- Earth-S
- New York City
- Dexter Knox's Private Laboratory
- New York City
- Rock of Eternity
- Planet Pluto
- The UN Space Bureau
- Planet Prep Space School
- The UN Space Bureau
Items:
- Knox's Time Pills
- Knox's Radarscope
- Knox's Futurescope
Vehicles:
Synopsis for Headline Harry: "The Worm Turns"
Appearing in Headline Harry: "The Worm Turns"
Featured Characters:
- Headline Harry
Supporting Characters:
Antagonists:
Other Characters:
Locations:
Items:
Vehicles:
Synopsis for The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter Two: The Sivana Sabotage"
The Sivanas push a meteorite towards the Academy, but the Marvels stop it. The Sivanas parachute in and disguise themselves to sabotage the Academy. The Marvels stop the sabotage attempts. However they find Sivana is holding Dexter hostage with a knife at his throat, and he tells the Marvels to turn back. When they do they are coshed by Jr. and Georgia. All four kids are bound and gagged and taken to a ship being used for target practice.
Appearing in The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter Two: The Sivana Sabotage"
Featured Characters:
Supporting Characters:
Antagonists:
- The Sivana Family
Other Characters:
Locations:
- Earth-S
- New York City
- Planet Prep Space School
- A Pressurized Chamber
- A Space Freeze Chamber
- Planet Pluto
Items:
- Knox's Time Pills
- An Atomic Engine
Vehicles:
- The Target Dummy Ship
Synopsis for "Podges and the Pill-Roller"
Appearing in "Podges and the Pill-Roller"
Featured Characters:
- Podges
Supporting Characters:
Antagonists:
Other Characters:
- the Pill-Roller
Locations:
Items:
Vehicles:
Synopsis for The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter Three: Battle in Space"
All four kids are bound and gagged and taken to a ship being used for target practice. The ship is towed into the air while the Sivanas watch. However Billy jumps out in time followed by the others. He then uses his foot to remove Freddy's gag, he becomes Captain Marvel Jr., frees the others who transform, and they save Dexter. The trained fleet sets off, though Dexter isn't allowed being too young. They defeat the Sivana Fleet after a rousing talk from Dexter, and Mary Marvel stops the Sivanas escaping by time travel on Pluto. The Marvel Family take the Sivana Family back to 1952.
Appearing in The Marvel Family: "The Marvel Family and the Great Space Struggle, Chapter Three: Battle in Space"
Featured Characters:
Supporting Characters:
Antagonists:
- The Sivana Family
Other Characters:
- The Planet Prep Space School Interplanetary Space Patrolmen, Graduating Class of 1960
Locations:
- Earth-S
- New York City
- Dexter Knox's Private Laboratory
- Planet Prep Space School
- New York City
- Planet Pluto
Items:
- Atomic Artillery Shells
- A Free Space Flagpole
Vehicles:
- Sivana's Time Ship
Notes
- Billy, Mary, and Freddy each get a new blackjack-inflicted concussion in Chapter 2.
Trivia
- Also appearing in this issue of The Marvel Family were:
- Boxcar Benny: "Well-Defined"
- "Yellow Kid" (text story) by Rod Reed
- The Marvel Family Puzzle Page
See Also