The original series aired on Cartoon Network from 2004 until 2009, featuring the adventures of Mac, his imaginary friend Bloo, and all the other imaginary creatures that are found in the titular Home.

Foster’s Home For Imaginary Friends is a classic Cartoon Network ... It has been over fifteen years since last we saw Bloo, Mac, and the stable of fictional characters that are a part of Madame ...

An evil imaginary friend sets a sinister plot in motion against Bloo, and Mac and the home's residents must save him. Frankie goes to the mall to get a gift for Madame Foster's birthday ...

The original series focused on two best friends ... The series focused on Mac and his imaginary friend Bloo and their adventures, primarily set in a house dedicated to abandoned imaginary friends.

Eight-year-old Mac and his imaginary friend Blooregard Q. Kazoo (or "Bloo" for short) often get into fights with his 13-year-old brother Terrence. When Mac's mother tires of this behavior ...