What episode does Sasuke take itach's eyes?

no why would he after his death sasuke finally figured out why itachi killed him self by the way he couldn't cause his body was eliminated with no ash in 30 seconds and itachi killed himself cause he new that he needed to protect sasuke and he new that he did not have inuf time to kill sasuke so he had to kill himself before the ninja war happens again and so he gives all his powers to saskue and stayed beside him as a spirit