SELECT first_broadcast_uk___bbc_four__ FROM table_26591309_2 WHERE official_tns_gallup_ratings = 1575000
Kapan UK pertama yang disiarkan untuk episode dengan peringkat TNS Gallup resmi 1575000?
CREATE TABLE table_26591309_2 (first_broadcast_uk___bbc_four__ VARCHAR, official_tns_gallup_ratings VARCHAR)