CREATE TABLE table_24698 ("No." FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

what is the smallest series episode number whose production code is 2t7211?
SELECT MIN("No.") FROM table_24698 WHERE "Production code" = '2T7211'
SELECT MIN("No.") FROM "table_24698" WHERE "Production code" = '2T7211'