CREATE TABLE table_1954 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

In season 5 what episode number was production 06-03-519?
SELECT COUNT("No. in season") FROM table_1954 WHERE "Production code" = '06-03-519'
SELECT COUNT("No. in season") FROM "table_1954" WHERE "Production code" = '06-03-519'