CREATE TABLE table_27076 ("Episode" FLOAT, "Stage" TEXT, "Celebrities" TEXT, "Directed and produced by" TEXT, "Original airdate" TEXT, "Viewers  ( overnight estimates ) " TEXT)

Which episode had celebrities Nick Hewer and Saira Khan in them?
SELECT "Episode" FROM table_27076 WHERE "Celebrities" = 'Nick Hewer and Saira Khan'
SELECT "Episode" FROM "table_27076" WHERE "Celebrities" = 'Nick Hewer and Saira Khan'