both My Name is Earl and Everybody Hates Chris finished with 4 seasons.
My Name Is Earl: NBC Cancelled the series on May 19, 2009. Season four had ended with the caption 'To Be Continued'. The series' producer, 20th Television, approached the Fox, ABC, TBS and TNT networks to continue the series, but were unable to come to terms without "seriously undermining the artistic integrity of the series".
Everybody Hates Chris: On May 21, 2009, the CW network announced that they had cancelled Everybody Hates Chris. Prior to this, executive producer (and inspiration for the show) Chris Rock announced that the end of season 4 matched up with his own past — dropping out of high school to become a comedian — and that it was time to end the show.