My brother, little Arjan, has created a serum to bring people back from the dead!?

My brother, little Arjan, only last week created a serum that is designed to bring people back from the dead. Knowing Arjan, I knew it wouldn't be too long before he tried to use the potion. Within a day of his announcement, Arjan had brought Mussolini back from the dead. At first little Arjan playing the hand of God was intriguing and certainly amusing but eventually, things became unbearable and little Arjan became obsessed (as often happens). Two days ago I saw little Arjan talking to both Hitler and Churchill in his room and actually made them 'hug it out', whilst I was impressed by his diplomatic skills, I also feared for his safety as Arjan is not a member of the fabled 'master race'. The next day I knew things had gone too far when he had raised an entire graveyard and made them his slaves, certainly zombies serving me drinks was a novelty for a while but most could not master 21st century devices such as microwaves and my cheese toastie was horrible. The worst? He has become chummy with Darth Vader and together they are plotting to take over the world. Normally I would wait for such a phase to p but little Arjan has got himself in with some really bad characters and I need some help. Feedback would be appreciated!