CREATE TABLE table_21383 ("DVD Name" TEXT, "Ep #" FLOAT, "Region 1" TEXT, "Region 2  ( Scandinavia ) " TEXT, "Region 2  ( UK ) " TEXT, "Region 4" TEXT, "Special features" TEXT)

Name the region 1 where region 4 for april 2, 2009
SELECT "Region 1" FROM table_21383 WHERE "Region 4" = 'April 2, 2009'
SELECT "Region 1" FROM "table_21383" WHERE "Region 4" = 'April 2, 2009'