Question: What is every original air date with U.S. viewers of 0.23 million?
SQL: SELECT "Original air date" FROM "1-29803475-2" WHERE "U.S. viewers (million)" = '0.23';

Question: What is the lowest number in series when U.S. viewers is 0.23 million?
SQL: SELECT MIN("No. in series") FROM "1-29803475-2" WHERE "U.S. viewers (million)" = '0.23';