CREATE TABLE table_30221 ("Series #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

Who wrote the episode that 2.93 million viewers?
SELECT "Written by" FROM table_30221 WHERE "U.S. viewers (million)" = '2.93'
SELECT "Written by" FROM "table_30221" WHERE "U.S. viewers (million)" = '2.93'