CREATE TABLE table_22065 ("Story No." TEXT, "Episode" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "UK viewers  ( million ) " TEXT, "AI  ( % ) " FLOAT, "Original air date" TEXT, "Production code" TEXT)

Name the total number directed by for uk viewers being 6.86
SELECT COUNT("Directed by") FROM table_22065 WHERE "UK viewers (million)" = '6.86'
SELECT COUNT("Directed by") FROM "table_22065" WHERE "UK viewers (million)" = '6.86'