S3 E1 • Eddie Monster

Eduardo runs away from the home to prove that he's not a coward. Meanwhile, Terrence is looking for an imaginary friend to compete in the Extreme-O-Saur Battle, and he comes across Eduardo. Terrence uses him to fight against huge imaginary friends at the dumpster. Mac, Bloo, Wilt, and Coco must search for Eduardo.

Première diffusion : 22 juillet 2005

S3 E2 • Hiccy Burp

Richie Wildebrat, a kid at Mac's School, keeps braging about his imaginary friend, Blake Superior, and he keeps bragging about him winning the imaginary friend talent show pageant. Mac wants to beat him so it can end Richie's bragging, so he asks Bloo to enter in the pageant, but Bloo doesn't want to, then he gets the hiccups, which Blake says is ridiculous, so Bloo enters. How is Bloo going to beat Blake Superior with his hiccups?

Première diffusion : 5 septembre 2005

S3 E3 • Camp Keep a Good Mac Down

Mac and Bloo ask Mr. Herriman to go camping out in the wilderness. Madame Foster thinks it is a great idea to get away from all the civilization for a while, but when Bloo eats all of the food on a camping trip, everyone struggles to survive. Adversity sets in as Mr. Herriman encounters real bunnies, Madame Foster fights against a bear, Wilt gets stuck in quicksand, Coco has trouble casting a live fish, and Eduardo feels upset about Mac and Bloo trying to hunt the animals down for food. Will they ever make it out in one piece?

Première diffusion : 9 septembre 2005

S3 E4 • Imposter's Home for Um... Make 'Em Up Pals

Goofball John McGee comes to Foster's, who is a total pain. Frankie thinks he's a teenage kid passing himself off as a imaginary friend, who always needs help on homework, needs to wash his jerseys, and eats all the food that Frankie bought from the store, but everyone else believes otherwise. So now, Frankie is out to prove him as a fraud. But is he really the fraud Frankie thinks he is?

Première diffusion : 16 septembre 2005

S3 E5 • Duchess of Wails

Duchess is adopted by Mac's neighbors, and Foster's doesn't want to take her back. Meanwhile, Terrence told Mac that his mom is thinking about moving to Singapore. It's up to Mac and Bloo to get rid of Duchess. They try to frame Duchess for what they did to their home, but it only makes the family love Duchess even more. Mac and Bloo have no choice but to return her back to Foster's. However, Terrence decides to help the others back at Foster's Home to keep Duchess away.

Première diffusion : 23 septembre 2005

S3 E6 • Foster's Goes to Europe

Mac enters a contest to win a trip to Europe. But when the gang tries to pack at the last second, everyone has delays that keep the gang from going. While at the same time, Mac is getting more upset. Will Mac and his friends be able to make their flight to Europe on time?

Première diffusion : 4 novembre 2005

S3 E7 • Go Goo Go

After Mac bumps into a girl named Goo when he gets something out of a tree, she thinks that Mac is her boyfriend, and Goo begins visiting Mac everyday at Foster's. With her hyper active imagination, she creates a new friend one after another, which causes a big problem for the other imaginary friends in the house. After she creates so many imaginary friends that it crowds the whole house, the others have to sleep in the Foster's bus. Can Mac stop Goo from creating so many friends?

Première diffusion : 11 novembre 2005

S3 E8 • Crime After Crime

Mr. Herriman becomes addicted to carrots. Meanwhile, Bloo tries desperately to avoid eating Frankie's "it" by doing bad things, but Mr. Herriman ignores or misinterprets the bad deeds and sends everyone else to bed with no supper instead. Also, Frankie learns to cook "it" under the guiding (and painful) wooden spoon of Madame Foster.

Première diffusion : 18 novembre 2005

S3 E9 • Land of the Flea

When Eduardo gets fleas while getting one of the house’s imaginary puppies to take a bath, he becomes discontent as the fleas are driving him mad. However, despite the way he feels, he decided to keep the fleas on him because he believe they’re his friends; though Frankie and Mr. Herriman want none of it and they decide to go to drastic lengths to get the fleas removed. Meanwhile, Bloo wants to get some fleas of his own and he does anything possible in order to attempt to get Eduardo to share them.

Première diffusion : 25 novembre 2005

S3 E10 • A Lost Claus

When a hoard of imaginary Santas enter the house, Mac starts to believe that there is no such thing as Santa Claus. Bloo decided to try to prove him wrong, in hopes of getting the real Santa to deliver him more presents, so they go about trying several experiments that would logically prove Santa is real. Will Mac be able to regain his faith in Santa Claus or will this be the worst Christmas ever for Foster’s and Mac alike?

Première diffusion : 1 décembre 2005

S3 E11 • One False Movie

Mac makes a home movie about Foster's Home for his school project, but Bloo edits it into a blockbuster hit. This leads him to be entered in the state student film festival. With Bloo's help, they make T-Rexatron III Alien Wolfhound, A Prequel In Time: The Unrelenting. Eduardo, though, thinks he has a problem breaking wind when it was Bloo doing sound effects and doesn't want to be in Bloo's movie which forces Bloo to make him to a computer animated character in his movie. What happens at the wrap party and how will the movie turn out?

Première diffusion : 10 février 2006

S3 E12 • Setting a President

Everyone in Fosters is sick of Herriman's rules, so Frankie decides that she shoud run for president. Bloo hears about this and decides to take an oppurtumity. Bloo seems to have the most chances of winning but Frankie tells them that she helped them every day. Frankie now is having the upper and but Herriman might have a trick under his rabbit sleeve. Who will win in the end: Franke, Bloo,or Mr. Herriman?

Première diffusion : 17 février 2006

S3 E13 • Room With a Feud

When a recent adoption leaves a room at Foster's vacant, Bloo, Coco, Wilt, and Eduardo all fight over it, along with another friend named Peanut Butter. Everybody soon starts to make contests to see who will win the room, which leads Bloo to try to make contests that he can cheat at. how will they settle this fight and who will win the room?

Première diffusion : 16 mars 2006

S3 E14 • Cuckoo for Coco Cards

When Mac taks his classmates on a field trip to Foster's, everybody loves Coco and Bloo wants all the attention after Coco lays eggs with imaginary friend trading cards. Soon, when Bloo throws eggs at everyone, they run away and now Coco hates Bloo. When all the friends start trading and collecting the cards, soon Bloo gets intrested and starts to collect them all. Will Bloo collect all of them without Coco's help?

Première diffusion : 24 mars 2006