Season 4
01. Challenge of the Superfriends
Bloo gets jealous when Mac is chosen to be the sidekick of an imaginary superhero friend.
02. The Big Picture
As everyone gets ready to take the annual house photo, Mac and Bloo notice another picture that was taken years ago.
03. Squeeze the Day
Mac and Bloo have a fun day by themselves in the mansion.
04. Neighbor Pains
Bloo is teased by a child who lives across the street.
05. Infernal Slumber
Mac is surprised when Bloo and the rest of the gang show up at his place for a slumber party.
06. I Only Have Surprise for You
Mac doesn't want a surprise party.
07. Bus the Two of Us
Bloo takes Mac for a secret ride on the Foster's bus.
08. The Big Cheese
Everyone gets locked out of the home, and only Cheese knows the code to get back in.
09. Bloo's the Boss
Bloo wants to open his own home for imaginary friends when he feels dejected.
10. Emancipation Complication
Chaos ensues when a new imaginary friend is created to cheat on a history test.
11. Make-Believe it or Not!
Mac and Bloo are imprisoned by evil characters unwittingly created by Goo in her sleep.
12. Good Wilt Hunting (1)
Wilt runs away in search of his creator after he receives no visitors at the annual picnic, so Bloo and the gang head out to find him and discover some interesting things about Wilt's secret past along the way.
13. Good Wilt Hunting (2)
Wilt runs away in search of his creator after he receives no visitors at the annual picnic, so Bloo and the gang head out to find him and discover some interesting things about Wilt's secret past along the way.