CREATE TABLE table_27077 ("Episode" FLOAT, "Stage" CLOB, "Celebrities" CLOB, "Directed and produced by" CLOB, "Original airdate" CLOB, "Viewers  ( overnight estimates ) " CLOB)

List the director and producer when Nick Hewer and Saira Khan were starring.
SELECT "Directed and produced by" FROM table_27077 WHERE "Celebrities" = 'Nick Hewer and Saira Khan'
SELECT "Directed and produced by" FROM "table_27077" WHERE "Celebrities" = 'Nick Hewer and Saira Khan'