Let us trace the evolution of Vader as a character. We see the tall dark figure for the first time in Episode IV. It’s a war machine with very little human left in him. Unstoppable, he plods from one scene to another crushing any opposition. Well, that’s a character in whose realism we are ready to believe. Episode V. The mechanical man realizes that he has a son. So, there is something human buried beneath the black armor! No. He needs Luke as a tool to topple the Emperor. The audience is left ignorant about the true powers of Galaxy’s enigmatic sovereign. The fact that Vader kneels before his hologram explains nothing: it can be just etiquette. Episode VI. As the hooded figure emerges from imperial shuttle, we realize that it’s limping dotard who rules the Empire, Vader being a dog on his leash! The Dark Superman, the incarnation of Evil has been reduced to a mumbling servant waiting for his master’s orders. - Thou shalt complete the battle station. - Yes master! - Thou shalt bring thy son before me. - Yes master! - Thou shalt fall on thy knees and fetch my cane. Vader does everything he is ordered to do. Following an order he fights his son. His lust for power is extinguished. We see a slave who desires to kill his master but dares not. The plan to overthrow the Emperor is buried. Buried is also the character the audience has been admiring for two episodes! As all eyes are fixed on the uncanny figure of Palpatine and all hearts beat feverishly in anticipation of the final moment of the Saga, the Vader controversy goes unnoticed. Yet, it exists and becomes evident once you start rethinking the movie. The Rule of Two eliminates the controversy. With the knowledge that only two Sith can exist at the same time the duel scene in Episode V can be seen from a new perspective. Behind the black mask we see a loving father desiring a better future for his son, though he knows that this son of his (and a potential apprentice) will kill him one day. Vader’s actions in the final episode of the Saga acquire completely different meaning. Realizing his inability to convert his son alone, he decides to let Luke replace him. Vader enters Emperor’s throne room on the Death Star with clear intent to die there freeing his place at Palpatine’s side to his offspring. He fights Luke and succumbs to superior force. Only upon realizing that his son is going to get killed does he get up and through Palpatine into the pit.