Unable to see his son get killed, Vader steps in and throws Palpatine down the reactor shaft, to his apparent death. While this is happening though, Darth Vader gets fatally electrocuted. Luke, at his father's request, takes off his helmet so he can look at his son one last time, with his real face.

Who kills Darth Vader?

During the battle, Anakin, who had been known as the Sith Lord Darth Vader, was redeemed by Luke and brought balance to the Force. However, the redemption cost Anakin his life, having been mortally wounded by the Emperor, Darth Sidious, while killing his former Master.

Why did Darth Vader kill himself?

Once he becomes Darth Vader, each evil act he commits shatters any hope or connection towards his previous life, which makes it harder for him to return to the light, but he ultimately escapes the dark side and redeems himself by sacrificing his life to save his son, Luke Skywalker, and kill the Emperor in Return of ...