CREATE TABLE table_62990 ("Title" CLOB, "Series" CLOB, "Director" CLOB, "Production Num." CLOB, "Release date" CLOB)

What was the release date for Production Number 8181?
SELECT "Release date" FROM table_62990 WHERE "Production Num." = '8181'
SELECT "Release date" FROM "table_62990" WHERE "Production Num." = '8181'