It's my first time visiting this forum, as I do not watch this show all the time. My father however, loves CAS, and I love to watch it with him whenever I can. I do not feel that Bindusar will be killed. There's a lot that Bindusar needs to know. You have also written in your post that he goes on a pilgrimage. That could very well happen. He might find out the truth behind the death of Chanakya, Sushim and Rani Charumitra, and Siamak. This will probably sadden and upset Bindusar so much that he could not see the enemies within his own palace and doubted Ashok so much. This realization could compel Bindusar to leave the throne and seek pilgrimage. I believe if I remember correctly, Chandragupta also sought pilgrimage, but if my memory serves me right, it was because he sought higher spirituality and left the throne to Bindusar.