CREATE TABLE table_2906 ("Episode" TEXT, "First broadcast" TEXT, "Davids team" TEXT, "Lees team" TEXT, "Scores" TEXT)

What is the episode number that was first broadcast on 3 September 2010?
SELECT "Episode" FROM table_2906 WHERE "First broadcast" = '3 September 2010'
SELECT "Episode" FROM "table_2906" WHERE "First broadcast" = '3 September 2010'