CREATE TABLE table_16565 ("Character" TEXT, "Portrayed by" TEXT, "Relationship" TEXT, "First appearance" TEXT, "Last appearance" TEXT)

What episode had the last appearances of the late wife of mac taylor?
SELECT "Last appearance" FROM table_16565 WHERE "Relationship" = 'Late wife of Mac Taylor'
SELECT "Last appearance" FROM "table_16565" WHERE "Relationship" = 'Late wife of Mac Taylor'