Though neither Frank Castle nor Billy Russo were fully aware of it at the time, their final confrontation in The Punisher’s first season was overlaid with a thematic weight that was larger than the sum of its parts. Their fight was a chance for Frank to avenge his family’s deaths, yes, but it was also a moment that…
Source: io9 – Jigsaw Is The Punisher’s Most Fascinating Puzzle Because Frank Castle Can’t Solve Him