Foster's Home for Imaginary Friends: Season 4
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of Foster's Home for Imaginary Friends Season 3.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Episode Guide
Season 4 Progress Shield
Challenge of the Superfriends
Apr 28, 2006
When a large and dangerous imaginary friend is destroying the city, a superhero friend named Imaginary Man comes and saves the day, leaving Mac impressed. But once Mac becomes Imag
The Big Picture
May 5, 2006
The residents prepare for the annual house photo. Meanwhile, Bloo, Mac and Goo search for an answer behind a weird photo of Foster's taken years ago, Eduardo gets an "extreme makeo
Squeeze the Day
May 12, 2006
When the home's residents go to the beach and leave Bloo in the house alone on purpose so that he doesn't ruin the fun, he and Mac try to squeeze in as much fun as possible and mak
Neighbor Pains
May 19, 2006
Old Man Rivers, who lives across the street from Foster's, does not want imaginary friends on his lawn, and on "Adopt-A-Thought Saturday," his grandson, Young Man Rivers, makes fac
Infernal Slumber
Jul 17, 2006
Bloo, Wilt, Eduardo, and eventually more guests arrive at Mac's apartment for a slumber party that Mac didn't plan. But because they are all so loud, Mac's mom or Terrence could wa
I Only Have Surprise for You
Jul 27, 2006
Bloo, along with the rest of the house, plan a surprise party for Mac. However, Mac wants no part of it and tries to destroy their plans.
Bus the Two of Us
Aug 1, 2006
Bloo notices after a trip to the grocery store that Frankie has left the keys in the bus, and decides to take Mac for a joyride in the Foster's bus, and Wilt, Coco and Goo promise
The Big Cheese
Aug 7, 2006
Foster's is going to be on TV, and Frankie wants everything perfect. Meanwhile, Cheese keeps showing up at Foster's, despite being told numerous times that he doesn't live there. I
Bloo's the Boss
Nov 3, 2006
Bloo alerts that an imaginary friend is in trouble. No one wants to help him at first because it might be a trick, but Madame Foster forces Frankie, Coco, Wilt, and Eduardo to help
Emancipation Complication
Nov 10, 2006
An imaginary pen, that resembles Abraham Lincoln, is caught with a student cheating on a test by Mac's teacher. He is saved from the classroom's closet by Mac and Bloo along with h
Make Believe it or Not
Nov 17, 2005
In her sleep, Goo accidentally creates all the villain characters from a make-believe game that she had helped out on while the power was out at the home during a thunderstorm, who
Good Wilt Hunting (1)
Nov 23, 2006
It's time for the 5 Year Creator Reunion Picnic, where imaginary friends' creators come to Foster's to see their imaginary friends. However, once again, Wilt's creator doesn't show
Good Wilt Hunting (2)
Nov 23, 2006
Bloo and the gang are out to find Wilt and discover some interesting things about his secret past along the way.