Frankie and Madame Foster are leaving for a while, so Mr. Herriman is placed in charge of the house. However, Madame Foster inadvertently gives Bloo the idea to throw a wild party, and he plans to do so without Mr. Herriman's consent. While they manage to come up with a method to distract Mr. Herriman, there is still one person that could stop the party, and that's Mac, though Bloo knows that with a little bit of sugar, Mac can be placed under control, or so he thinks.

The episode was rated 8.09 from 23 votes.

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?

The episode was rated 8.10 from 10 votes.

It's Madame Foster's birthday and Frankie has forgotten the one thing necessary for any party, the streamers! As Mr. Herriman orders her to go get some, Bloo, Eduardo, Mac, Wilt, and Coco tag along as well. They have five minutes left until they can leave, so they stop a one store and Frankie falls asleep in a vibrating chair and when she wakes up, everyone left to different places. Will Frankie be able to get to the party in time?

The episode was rated 8.11 from 37 votes.

When Mac visits Foster's, Bloo wants to show him something up on the roof, though when it's time for them to go back downstairs, they find themselves lost and unable to get downstairs. With Bloo becoming unstable due to hunger and Mac potentially getting in more and more trouble with each passing minute, will they manage to find their way back down before it's too late?

The episode was rated 8.11 from 18 votes.

It's Adopt-A-Thought Saturday, an event that focuses on getting good friends adopted on the weekends when children are out of school. But Mac and Bloo find out after their good friend Jokey gets adopted. While the event is usually a good thing for both imaginary friends and those seeking to adopt them, Bloo doesn't want his friends to be adopted, so he works with Mac to try to find a way to put an end to the event. From atracting friends in the house with scented cupcakes to dropping plastic spiders, they try as many plans as they can. Will they be successful in prevent the adoption of their friends, or are their best efforts in vain?

The episode was rated 8.14 from 14 votes.

When Foster's needs a new roof, Bloo bakes up a plan to sell Madame Foster's amazing cookies after his first attempt at selling lemonaid int he middle of winter failed. When they finally get enough money to buy a new roof, Bloo gets a "little" carried away and wants to become rich and make all the imaginary friends his servants! Will Bloo's business plan work, or will his treatment of the friends make his sweet success turn sour?

The episode was rated 8.17 from 24 votes.

Mr. Herriman isn't happy about Bloo being able to stay at the home indefinitely, and is getting on the little guy's case about the rules of the house. Unfortunately, when Bloo learns that Mr. Herriman will have him ejected from the home if he doesn't toe the line, Bloo gets so stressed out that he accidentally breaks a statue of Madame Foster! Bloo and his buddies will have to fix the "busted bust" before Mr. Herriman finds out and has Bloo thrown out on the street.

The episode was rated 8.22 from 23 votes.

Blooregard plans to play the ultimate trick on Halloween after tying down Mac onto a bed preventing another sugar rush, but when things go awry, most of the main characters of the residence turn into zombies.

The episode was rated 8.23 from 13 votes.

Mac takes Bloo to school for show and tell. The kids love Bloo so much, that they imagine Bloos themselves. Tons of Bloos are created, and Bloo dubs them his brothers and himself leader, but will Bloo take it too far?

The episode was rated 8.27 from 15 votes.

Bloo finds out about a door in the home that everyone is forbidden to open. As he asks around about the door, no one tells him what is inside of it. However, in the middle of the night, Bloo manages to sneak to the door and open it, but will he like what he has found or will his deeds cause untold trouble?

The episode was rated 8.32 from 25 votes.

The series finale. When Herriman tells Bloo that Mac is moving, Bloo decides to give him the best day ever, though things do not go as he plans. All day, Mac does things with everyone but Bloo, making him angrier after every disappointment. However to everyone's surprise/relief (and Mr. Herriman realizes he forgot to mention this), it turns out Mac is moving to an apartment (the one next door) that was held by Louise's family, and with Cheese unable to follow her because her new home doesn't allow imaginary friends, he moves into Foster's. This was Craig McCracken's final project before he quit his job at Cartoon Network.

The episode was rated 8.36 from 11 votes.

Mac and Bloo are using Frankie's digital camera to make video interviews for the new Foster's website, when they stumble upon Mr. Herriman indulging Madame Foster's whims and doing a little dance for her. Much to Mac's chagrin, not only do Bloo and Frankie show the embarrassing footage to almost everyone in the house, but Bloo uploads the film to the Internet. It won't be long before Mr. Herriman discovers he's become the latest Internet fad, and you can bet he won't be happy!

The episode was rated 8.43 from 21 votes.

Bloo is jealous of Wilt getting special attention for the number of abandoned imaginary friends he brings to Foster's, so he tries to rescue imaginary friends just like Wilt does. When Bloo finds a man in a cell-phone suit and thinks he is a friend, he takes him to Foster's, thinking everyone will give him more praise than they give Wilt.

The episode was rated 8.60 from 15 votes.

The gang goes an arcade and everyone's winning lots of tickets except Bloo. Bloo then becomes very interested in a prize that's 500 tickets: glow in the dark Dracula teeth. So Bloo wants them to give them their tickets so he can get one, but the others decided to collect all of their tickets and get a rubber elephant, which Bloo grows an obsession with later on. But when Frankie, who's holding the rubber elephant, goes to sleep, Bloo sneaks in and steals it. When he's playing with, it breaks. The only option is to go to the arcade and win 500 tickets to get another rubber elephant. Can he get the elephant before the others find out?

The episode was rated 8.83 from 12 votes.

After Eduardo finds a puppy when he was taking out the trash, he decides to keep it, despite the fact that dogs are not permitted inside the house. However, despite Eduardo's best efforts, the dog gets loose and starts causing problems that Eduardo takes the blame for in fear of the puppy being found out. Will Eduardo manage to keep the puppy without Mr. Herriman finding out, or will the puppy be forced to leave due to Mr. Herriman's strict policy against dogs?

The episode was rated 8.87 from 15 votes.