CREATE TABLE table_17470 ("#" FLOAT, "Episode" CLOB, "Director" CLOB, "Writer" CLOB, "Original airdate" CLOB, "Viewers" CLOB)

who is the writer for episode 'episode 7
SELECT "Writer" FROM table_17470 WHERE "Episode" = 'Episode 7'
SELECT "Writer" FROM "table_17470" WHERE "Episode" = 'Episode 7'