Question: what is the total viewers where the date of first broadcast is 28 January 2010 and the episode number is 1?
SQL: SELECT MIN("Total viewers") FROM "1-12995531-3" WHERE "Date of first broadcast" = '28 January 2010' AND "Episode number" = 1.0;

Question: what is the episode number where the total viewers is 614000?
SQL: SELECT MIN("Episode number") FROM "1-12995531-3" WHERE "Total viewers" = 614000.0;

Question: what is  the series number where the date of first broadcast is 16 October 2008?
SQL: SELECT "Series number" FROM "1-12995531-3" WHERE "Date of first broadcast" = '16 October 2008';