Question: When was the first UK broadcast for episode 9?
SQL: SELECT "First broadcast UK ( BBC Four )" FROM "1-26591309-2" WHERE "Episode" = 9.0;

Question: When was the first UK broadcast for the episode with an official TNS Gallup rating of 1575000?
SQL: SELECT "First broadcast UK ( BBC Four )" FROM "1-26591309-2" WHERE "Official TNS Gallup ratings" = 1575000.0;

Question: When was the first UK broadcast when the official Barb ratings was 1085000?
SQL: SELECT "First broadcast UK ( BBC Four )" FROM "1-26591309-2" WHERE "Official BARB ratings" = 1085000.0;