CREATE TABLE table_23825 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( in millions ) " CLOB)

What series was directed by Mark Roskin?
SELECT MIN("Series #") FROM table_23825 WHERE "Directed by" = 'Mark Roskin'
SELECT MIN("Series #") FROM "table_23825" WHERE "Directed by" = 'Mark Roskin'