CREATE TABLE table_3957 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( millions ) " TEXT)

What is the number of this season's episode that had the production code 2t6206?
SELECT MIN("No. in season") FROM table_3957 WHERE "Production code" = '2T6206'
SELECT MIN("No. in season") FROM "table_3957" WHERE "Production code" = '2T6206'