CREATE TABLE table_2858 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

Name the most number in season for production code 3abc12
SELECT MAX("No. in season") FROM table_2858 WHERE "Production code" = '3ABC12'
SELECT MAX("No. in season") FROM "table_2858" WHERE "Production code" = '3ABC12'