Fred and the others are called in to help solve a mystery involving Fred's old professor, Professor Huh?; later Fred runs into his mentor Rose, and her gang.
Popeye and Bluto compete to see who can build a battleship the fastest to secure a government contract that will allow their shipyard to build an entire fleet.
Bluto and Popeye try to get hospitalized so that they can spend time with Olive the nurse, but they have a hard time getting injured despite their best efforts.
A dog catcher tries to catch Scooby; Shaggy and Scooby are haunted by the old Coolsville library librarian; Commander Cool and Metal Mutt stop an evil caterer.
Sylvester makes up a cookie monster after he eats Granny's cookies; the babies play with a box but fight over it; the song "The Looney Riddle" is featured.
Wilma finds a ring Fred was hiding for Barney and thinks it's for her. so to avoid disappointing her Fred tries to buy a second ring, but he can't afford it.
When Fred and his friend try out for a baseball team Fred loans his friend his uniform, so his friend draws attention in a uniform with Fred's name on it.
George is judging a dog show and must choose a winner without being swayed by his family, his boss or a mobster, all of which are pushing for their own dog.
Tom makes the Declaration of Independeninto a paper airplane; a museum mouse tells tales of Jerry's role in historical events; Tom tries to steal gold.
The gang stumbles into an angry lion's den while on a butterfly hunt; Scooby and his pals find trouble at a carnival; the gang encounters prehistoric creatures.
Velma gets an interview with a prestigious university and learns the dean wants Scooby and the gang to figure out why the founder's ghost haunts the campus.
The gang needs complete silence to solve the mystery of the creepy, bat-like Crystal Crawler in the Crystal Canopy where the slightest sound means disaster.
Scooby Doo and Shaggy have won a contest and the prize is a dinner date with their hero Vincent Van Ghoul, but their dream date may turn into a nightmare.
When Fred and his friend try out for a baseball team Fred loans his friend his uniform, so his friend draws attention in a uniform with Fred's name on it.
George is judging a dog show and must choose a winner without being swayed by his family, his boss or a mobster, all of which are pushing for their own dog.
The gang stumbles into an angry lion's den while on a butterfly hunt; Scooby and his pals find trouble at a carnival; the gang encounters prehistoric creatures.
Velma gets an interview with a prestigious university and learns the dean wants Scooby and the gang to figure out why the founder's ghost haunts the campus.
The gang needs complete silence to solve the mystery of the creepy, bat-like Crystal Crawler in the Crystal Canopy where the slightest sound means disaster.
A plant creature is being blamed for the disappearance of many people living nearby, and it appears to be building an army of more creatures like itself.
The Quest team's help is requested when a sheik and his people find themselves under attack by a group of outlaws riding indestructible robotic horses.
Thundarr's judgment is tested when he becomes caught in the middle of a battle between two powerful wizards who are after the legendary Helmet of Power.
Two castaways starving on a raft come upon an island inhabited by Bugs Bunny, who looks like a tasty meal, so the castaways run around trying to catch Bugs.