Mac discovers that an impostor has been checking out library books in his name and hires a detective to find the crook.

Coco escapes from Foster's and has a wild adventure.

The Friends start a prank war while staying at a hotel.

The gang posts videos on the Internet after a field trip is rained out.

Bloo and Mac compete in a 30-mile race.

Frankie is tired of working without being thanked. One day, a toy box is discovered at Foster's front door. Frankie is ordered to take it to the attic and leave it alone, but she knows there is an imaginary friend trapped inside, and opens the box to find it. When she looks inside, she falls into a strange imaginary world. There, she gets treated like a princess by a mysterious imaginary friend. After tackling certain bizarre toy box trials and tribulations, Bloo, Mac, Wilt, Eduardo, and Coco discover Frankie's whereabouts and set out to rescue her from this strange world. This is the first and only episode to have a TV-PG rating.

Frankie is tired of working without being thanked. One day, a toy box is discovered at Foster's front door. Frankie is ordered to take it to the attic and leave it alone, but she knows there is an imaginary friend trapped inside, and opens the box to find it. When she looks inside, she falls into a strange imaginary world. There, she gets treated like a princess by a mysterious imaginary friend. After tackling certain bizarre toy box trials and tribulations, Bloo, Mac, Wilt, Eduardo, and Coco discover Frankie's whereabouts and set out to rescue her from this strange world. This is the first and only episode to have a TV-PG rating.

A deliriously ill Bloo attends Mac's birthday party and daydreams about his adventures as a superhero.

The friends have a house-wide dare competition that quickly gets out of hand.

Recently adopted friends write worrisome letters describing life outside Foster's walls.

Frankie and Mr. Herriman host a party at Foster's and ask the friends to stay outside or upstairs.

The friends plan a perfect day for Mac, whom they believe is moving away.