CREATE TABLE table_22606 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

Who wrote episode 74?
SELECT "Written by" FROM table_22606 WHERE "No. in series" = '74'
SELECT "Written by" FROM "table_22606" WHERE "No. in series" = '74'