CREATE TABLE table_3358 ("Total" FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Canadian air date" TEXT, "UK air date" TEXT, "Canadian Viewers  ( millions ) " TEXT)

If the UK air date is February 18, 2013, who was the episode written by?
SELECT "Written by" FROM table_3358 WHERE "UK air date" = 'February 18, 2013'
SELECT "Written by" FROM "table_3358" WHERE "UK air date" = 'February 18, 2013'