Why Darth Vader Had To Kill Palpatine Himself In Return Of The Jedi 

screenrant.com -BY THOMAS bacon, pancetta affumicata - Emperor Palpatine's trap in Return of the Jedi was targeted at Luke Skywalker - and Darth Vader's redemption was the only way he could lose.
parole chiavi: darth vader, had to kill, palpatine, himself, return of the jedi, Star Wars