CREATE TABLE table_26607 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( millions ) " CLOB)

Who directed episode 28 in the series?
SELECT "Directed by" FROM table_26607 WHERE "No. in series" = '28'
SELECT "Directed by" FROM "table_26607" WHERE "No. in series" = '28'