CREATE TABLE table_17469 ("#" FLOAT, "Episode" CLOB, "Director" CLOB, "Writer" CLOB, "Original airdate" CLOB, "Viewers" CLOB)

who is the writer where viewers is 5.16m
SELECT "Writer" FROM table_17469 WHERE "Viewers" = '5.16m'
SELECT "Writer" FROM "table_17469" WHERE "Viewers" = '5.16m'