A power struggle develops over who gets the prize of two tickets to a movie premier when Frankie and another friend inadvertently help Mac and Bloo to win a radio contest.
It's Halloween and Bloo is bent on doing the ultimate trick, but when it goes wrong it sets off a chain of events that end up turning all of the Imaginary Friends into Zombies!
In an attempt to be cooler, Eduardo has started telling tall tales to the little friends in the Foster's nursery. But when one of those friends is moved into the big house, Eduardo panics and must stop him before he is exposed for being a liar.
In a companion episode to "The Big Cheese", Mr. Herriman has locked everyone out with the home's new security system, but a pint-sized friend named Peas is accidentally left inside! Now it us up to Peas to save the day by figuring out a way to get the front door open.
Fed up with Mr. Herriman's strict ways, the friends devise a plan to "mellow him out", but when it works and he starts slacking off, Foster's starts to fall apart! Now, they are forced to put things right and turn him back into his old stodgy self.
Mac turns to detective, Jackie Khones to help him solve the mystery of who checked out library books in Mac's name and never returned them.
When the front door of Foster's is accidentally left, open, Coco escapes and goes on a wild and wacky adventure that spans the globe.
A bug infestation at Foster's forces Mr. Herriman to move the Friends to a hotel for the night, where Bloo's antics spark an all-out prank war.
After rain forces the cancellation of a trip to a water park, the friends turn to making fun videos of each other and posting them to the internet.
Mac and Bloo become locked in an epic competition when Bloo challenges Mac to a thirty mile race from the arcade back to Foster's. Will Bloo win?
After the appearance of a mysterious toy chest, Frankie Foster disappears! Inside this chest, Mac and Bloo and the gang discover an entire Imaginary World. They must navigate through this magical yet treacherous land to rescue Frankie from the ominous being who lives there.
Keith Ferguson
Blooregard
Sean Marquette
Mac
Grey Griffin
Frankie/Duchess
Tommy Kenny
Eduardo
Phil LaMarr
Wilt