CREATE TABLE table_23414 ("No. overall" CLOB, "No. in series" FLOAT, "Family/families" CLOB, "Location ( s ) " CLOB, "Original air date" CLOB)

Name the air date for uk17
SELECT "Original air date" FROM table_23414 WHERE "No. overall" = 'UK17'
SELECT "Original air date" FROM "table_23414" WHERE "No. overall" = 'UK17'