CREATE TABLE table_1684 ("Episode" TEXT, "First broadcast" TEXT, "Graemes guest" TEXT, "Jeremys guest" TEXT, "Votes  ( % ) " TEXT)

in what date was aired the first broacast of the episode 1x02
SELECT "First broadcast" FROM table_1684 WHERE "Episode" = '1x02'
SELECT "First broadcast" FROM "table_1684" WHERE "Episode" = '1x02'