Question: When did the series number 23 air?
SQL: SELECT "Original air date" FROM "1-11630008-3" WHERE "Series no." = 23.0;

Question: What is the production code of "Surprise, Surprise"?
SQL: SELECT MAX("Production Code") FROM "1-11630008-3" WHERE "Title" = '"Surprise, Surprise"';

Question: What was the airdate of 21 series number?
SQL: SELECT "Original air date" FROM "1-11630008-3" WHERE "Series no." = 21.0;