They returned Young Samson to his own time, where Goliath was guarding his motor scooter, and made their farewells.
History Inc made two minor forays into the past next. They went back to the 18th Century and met Jonathan Muddlemore and his cat Boo. (Both were Hanna-Barbera characters in 1971).
They also visited the Three Musketeers. (Porthos, Dartagnan, Athos and Aramis, as well as Constance and Tooly all featured in the Three Musketeers cartoons that were part of Hanna-Barbera's "Banana Splits Adventure Hour" in 1968.)
Then the team travelled much further into the future than they'd ever gone before, thousands of years beyond the times of the Partridge Family or the Jetsons or Jabberjaw and Sealab. They came to a time when conventional law enforcement methods had eliminated the need for super heroes. They visited the Museum of Ancient Super Beings, which had statues and information booklets about super heroes throughout history. In the center of the museum was a case surrounded by a force field, which could only be turned off by the curator of the museum, who had been giving them a tour of the whole building.
The case was labelled 'The Four Artefacts of Power' and included Young Samson's gold bracelets, Mightor's power club, Birdboy's artificial wings and his amulet for gaining super powers by absorbing sunlight, and Space Ghost's power bands.
"We know of your many efforts to assist in the exposure and apprehension of criminals who masqueraded as ghosts in your own time, and DNA and finger print scans taken when you entered the building have confirmed that you are indeed the members of Mystery Incorporated," said the Curator, "And now you have gone on to explore the timestream without corrupting the flow of history. So we wish to give you these artefacts to aid you in future deeds for justice. For So So, we can also give you working replicas of Blip's inviso belt and rocket pack."
So it was that Shaggy took the club, and called himself the new Mightor. Vaguely aware of a brief appearance of a Bird Girl in Birdman's time, Velma became her successor of the same name, using Birdboy's old equipment and costume. Fred became the new Young Samson, and found that the bracelets would also transform Scooby-Doo into the original Goliath dog's super powered lion form.
Daphne became the new Space Ghost.
However, they all found that, while in their super powered forms, none of them, not even Shaggy and Scooby-Doo themselves, were able to duplicate the eating accomplishments of Shaggy and Scooby-Doo in their regular forms.
Suddenly Shaggy began sneezing. It continued for several hours.
"We'd better get you to the doctor, Shaggy, so you'll know what to do about it," said Velma.
"Like, what do you mean?" asked Shaggy.
"You know what they say: Starve a fever, feed a cold."
"Like, really? I sure hope it's a cold!" said Shaggy.