CREATE TABLE table_62780 ("Title" TEXT, "Series" TEXT, "Director" TEXT, "Production Number" TEXT, "Release date" TEXT)

What is the release date of the mm series, which has the title tom thumb in trouble?
SELECT "Release date" FROM table_62780 WHERE "Series" = 'mm' AND "Title" = 'tom thumb in trouble'
SELECT "Release date" FROM "table_62780" WHERE "Series" = 'mm' AND "Title" = 'tom thumb in trouble'