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17 Episodes 2005 - 2007
Episode 1
Fri, Jul 22, 200523 mins
Eduardo runs away to prove he's not a coward, and is found by Terrence, who plans to use Eduardo to win an imaginary friend battle.
Episode 2
Mon, Sep 5, 200523 mins
Bloo decides to use his hiccups to win an imaginary friend talent show.
Episode 3
Fri, Sep 9, 200523 mins
Madame Foster takes the gang camping, but Bloo ends up eating all of the food. Madame Foster then sends Mr. Herriman out into the woods to find something to eat, but things don't go well.
Episode 4
Fri, Sep 16, 200523 mins
Someone named Goofball John McGee stumbles onto the Foster's property. Frankie thinks he's not really an imaginary friend, just a fraud; really a teenage kid in disguise, but everyone else believes otherwise. He always needs help with stuff, always at Frankie's expense. She is even more infuriated when they refuse to believe her when they think he really is an imaginary friend. So Frankie is more than anxious to expose him as a fake.
Episode 5
Fri, Sep 23, 200523 mins
Duchess gets adopted by Mac's neighbors, but her constant loud complaining becomes too much for Mac's mother to handle. Terrence tells Mac that they're moving, and Mac tries to get his neighbors to get rid of Duchess. When this fails, he tries to bring her back to Foster's. Terrence warns everyone at the house, and they try to prevent her from getting back in.
Episode 6
Fri, Nov 4, 200523 mins
Mac wins tickets for a trip to Europe, but everyone causes delays while packing. Already late for the trip, Frankie tries to make sure that Madame Foster can handle taking care of the house while she's gone, but Madame Foster just wants to break the rules.
Episode 7
Fri, Nov 11, 200523 mins
Mac meets a girl named Goo who begins to follow him to Foster's every day. Her over-active imagination creates many new imaginary friends, which causes Foster's to become overcrowded.
Episode 8
Fri, Nov 18, 200523 mins
Mr. Herriman's addiction to carrots causes him to hide carrots around the house. With no carrots, the only thing to have for dinner is a dish simply called "It." Mr. Herriman begins to punish anyone who comes near his hidden carrots, and Bloo tries to get in trouble so he doesn't have to eat "It."
Episode 9
Fri, Nov 25, 200523 mins
Eduardo gets fleas, with whom he becomes close friends, much to the consternation of Frankie and Mr. Herriman. Bloo, on the other hand, wants some fleas of his own.
Episode 10
Thu, Dec 1, 200522 mins
When several imaginary Santa Clauses are brought to Foster's, Mac begins to doubt that Santa is real. Bloo and the other friends try to prove to Mac that he exists. Bloo also tries to get Mr. Herriman to hand out more that one present to each person.

Episode 11
Fri, Feb 10, 200623 mins
Mac creates a film about Foster's for a school project, but Bloo edits and it changes it into something completely different. Eventually, the film gets entered in a film festival.
Episode 12
Fri, Feb 17, 200623 mins
Tired of Mr. Herriman's rules, Frankie and Bloo run for president of Foster's. When Bloo loses, he spreads untrue facts about Frankie to everyone in the house.
Episode 13
Thu, Mar 16, 200623 mins
A newly-adopted friend leaves a room vacant and Bloo, Wilt, Eduardo and Coco all compete for it, as does another imaginary friend named Peanut Butter.
Episode 14
Fri, Mar 24, 200623 mins
Coco lays eggs containing imaginary friend trading cards, and Bloo tries to be the first to collect all of them.
Episode 15
Sun, Jul 1, 20072 mins
Bloo finds a strange rock digging in the yard and it is declared to be a fossil by Phineus B. Vurm, the bookworm imaginary friend. Bloo treats it as a pet until Frankie reveals it is actually petrified feces.
Episode 16
Fri, Jun 23, 20062 mins
Jackie Khones questions Bloo about Mac's backpack and Bloo becomes obsessed with finding out what is in it.
Episode 17
Mon, Jan 1, 20072 mins
Mr. Herriman tells Bloo to sort the trash as punishment for him hosting a mud-wrestling tournament in the living room. Mac comes along and talks Bloo into pretending it is fun so that other people will want to do it.