 " MILF Island " was filmed in early March 2008 . The episode of 30 Rock which aired the following week , " Subway Hero , " was originally expected to air on April 10 , 2008 in place of this episode , but for unknown reasons " MILF Island " aired on that date instead . This marked the only time in the series ' first four seasons that completed episodes were not broadcast in the same order as they were produced . 
