CREATE TABLE table_3919 ("Episode #" FLOAT, "Series #" FLOAT, "Title" CLOB, "Director" CLOB, "Writer" CLOB, "Original airdate" CLOB, "Viewers  ( millions ) " CLOB)

Who wrote the episode that had 5.93 million viewers?
SELECT "Writer" FROM table_3919 WHERE "Viewers (millions)" = '5.93'
SELECT "Writer" FROM "table_3919" WHERE "Viewers (millions)" = '5.93'