CREATE TABLE table_27501 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

Who wrote episode number 149 in the series?
SELECT "Written by" FROM table_27501 WHERE "No. in series" = '149'
SELECT "Written by" FROM "table_27501" WHERE "No. in series" = '149'