CREATE TABLE table_23050 ("Series #" FLOAT, "Episode #" FLOAT, "Title" TEXT, "Written by" TEXT, "Directed by" TEXT, "Viewers" FLOAT, "Original airdate" TEXT)

What is the latest episode number with the title of Jerusalem?
SELECT MAX("Episode #") FROM table_23050 WHERE "Title" = 'Jerusalem'
SELECT MAX("Episode #") FROM "table_23050" WHERE "Title" = 'Jerusalem'