Question: Name the original air date for ai% for 83
SQL: SELECT "Original air date" FROM "1-18012738-1" WHERE "AI (%)" = 83.0;

Question: Name the story number for Paul Cornell
SQL: SELECT "Story No." FROM "1-18012738-1" WHERE "Written by" = 'Paul Cornell';

Question: Name the total number directed by for uk viewers being 6.86
SQL: SELECT COUNT("Directed by") FROM "1-18012738-1" WHERE "UK viewers (million)" = '6.86';

Question: Name the least ai %
SQL: SELECT MIN("AI (%)") FROM "1-18012738-1";