Issue: #3 B
A field trip to the planetarium unexpectedly results in an alien invasion. As interplanetary spring breakers overwhelm Bedrock, Fred, Barney, and the Loyal Order of the Water Buffalos are called into action.
First appearances: Professor Sargon, Sergeant Grumbles
Creators: Dave Sharpe, Steve Pugh, Ben Caldwell, Brittany Holzherr, Marie Javins, Mark Russell, Bilquis Evely, Chris Chuckry
Characters: Professor Sargon, Sergeant Grumbles, Rock Stone, George Nate Slate, Bamm-Bamm Rubble, The Great Gazoo, Barney Rubble, Fred Flintstone, Wilma Flintstone, Pebbles Flintstone, Dino, Betty Rubble