CREATE TABLE table_17866 ("#" FLOAT, "Episode" TEXT, "Writer" TEXT, "Director" TEXT, "Viewers ( millions ) " TEXT, "Original airdate" TEXT)

What's the writer of Episode 1?
SELECT "Writer" FROM table_17866 WHERE "Episode" = 'Episode 1'
SELECT "Writer" FROM "table_17866" WHERE "Episode" = 'Episode 1'