CREATE TABLE table_19586 ("Number of episode" FLOAT, "Number of season" FLOAT, "Title  ( original ) " TEXT, "Title  ( English ) " TEXT, "Original air date" TEXT)

What is the episode number where the English title is Pilot?
SELECT "Number of episode" FROM table_19586 WHERE "Title (English)" = 'Pilot'
SELECT "Number of episode" FROM "table_19586" WHERE "Title (English)" = 'Pilot'