While Mrs. Foster is away for the day, Mr. Herriman is left in charge with a mandate to have no wild parties. So, Bloo decides to distract Mr. Herriman and have the best party ever thrown.
Mac tries to get his friends to join Madame Foster's bowling team after her teammates are stolen away by an old rival.
"Where There's a Wilt, There's a Way" Wilt tries to watch a big sports game, but is constantly interrupted."Everyone Knows It's Bendy" The imaginary friend Bendy causes trouble throughout the home.
"Sight for Sore Eyes" A seeing-eye Friend gets upset when it loses its blind child."Bloo's Brothers" Mayhem ensues when Mac takes Bloo to school with him for show and tell.
Bloo hopes to raise money to buy Foster's Home for Imaginary Friends a new roof by selling cookies.
Mac offers to organize paperwork for Frankie so that she can have a Saturday night out with her friends. When she kisses him as a thanks, Mac finds herself instantly attracted to her.
Mac wakes up with a new imaginary friend in bed with him. When Bloo meets his new brother, he quickly becomes jealous of his new brother.
Bloo accidentally ruins his friends' squeking rubber elephant and has to figure out how to replace it before anyone finds out.
While telling jokes with the other imaginary friends, Bloo insults a large new friend. Thinking he has been challenged to a fight, Bloo desperately tries to hide.
Bloo finds out he can become famous if he is adopted by a producer, but the caveat is that Bloo can never see Mac again.
Bloo goes to Mac's school to see Mac and finds him studying. Thinking Mac is a nerd, Bloo sets out with disastrous results to make Mac cool.
Bloo becomes suspicious when a legendary imaginary friend, Uncle Pockets, returns to the home.
Coco is mistaken for a high society lady. Mr. Herriman decides to teach her to be a lady so that Foster's Home can get a donation at a charity event.
Eduardo decides to prove that he is not frightened by living in the real world beyond Foster's Home, so he runs away. But easily scared Eduardo finds life even more frightening when he ends up as Terrence's imaginary friend.