CREATE TABLE table_48907 ("Episode #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Originalairdate" TEXT)

What is Written By, when Originalairdate is 25 April 1993?
SELECT "Written by" FROM table_48907 WHERE "Originalairdate" = '25 april 1993'
SELECT "Written by" FROM "table_48907" WHERE "Originalairdate" = '25 april 1993'