Bullseye came up in conversation when Frank confronted Matt about Foggy's death at the end of episode 1, and Matt's reliance on the system instead of taking matters into his own hands with violence. Of course, Matt did push Bullseye off the roof of Josie's bar, but he's keeping that detail from Frank – for now, at least.

Frank Castle returns to Matt Murdock's life on the fourth episode of Daredevil: Born Again, but can the Man Without Fear trust the Punisher?

Jon Bernthal Pinpoints Key Difference Between Frank And Matt In Daredevil: Born Again, And I Think It's What Makes The Punisher So Great