CREATE TABLE table_19255 ("Total#" FLOAT, "Series#" FLOAT, "Title" TEXT, "Writer" TEXT, "Director" TEXT, "Original air date" TEXT)

How many of the episodes have Roger Goldby as the director?
SELECT "Total#" FROM table_19255 WHERE "Director" = 'Roger Goldby'
SELECT "Total#" FROM "table_19255" WHERE "Director" = 'Roger Goldby'