CREATE TABLE table_name_73 (station VARCHAR(255), services VARCHAR(255), zone_2008 VARCHAR(255), zone_2007 VARCHAR(255))
Which Station has a Zone 2008 of 8, and a Zone 2007 of outside zones, and Services of london overground?
    
SQL: SELECT station FROM table_name_73 WHERE zone_2008 = "8" AND zone_2007 = "outside zones" AND services = "london overground"