 " Halloween " was originally broadcast on NBC in the United States on October 18 , 2005 . The episode was viewed by 8 million viewers and received a 4 @.@ 1 rating / 10 % share among adults between the ages of 18 and 49 . This means that it was seen by 4 @.@ 1 % of all 18- to 49 @-@ year @-@ olds , and 10 % of all 18- to 49 @-@ year @-@ olds watching television at the time of the broadcast . The episode was the number one ranked episode among adults , men , and women in the 18 – 34 demographic , and achieved its highest 18 – 49 rating since the season 's premiere . " Halloween " retained 73 percent of its lead @-@ in My Name Is Earl audience , its best lead @-@ in retention at the time . 
