How Perseus Kill His Grandfather?

Perseus happened to be competing in funeral games in Thessaly where Acrisius was in attendance. He accidentally threw his discus with too much force, killing Acrisius, who was a spectator there, thus fulfilling the prophesy that Acrisius had tried so hard to avoid.

Where did Perseus kill his grandfather and how did he do it?

Perseus accidentially kills his grandfather, Acrisius in a discus throwing contest and fulfils the oracle's prophecy.

Who killed Perseus mom?

Acrisius committed Perseus with his mother to the sea in a wooden box, which was carried by the waves to the isle of Seriphus. Here the honest fisherman Dictys son of Magnes (See AeOLUS, 1) brought it to land with his net, and took care of mother and child.