Peter bid farewell to his brother on season four of Heroes. We'll miss Adrian Pasdar on the show.

This is one of the final shots of Nathan on Heroes. He ends his run on the show on the episode "The Fifth Stage."

Peter reacts to the death of his brother on Heroes. This shot is courtesy of the episode "The Fifth Stage."

Say your goodbyes, brothers. This is a scene from "The Fifth Stage," Adrian Pasdar's final episode of Heroes.

Peter tries to save Nathan's life here. Sadly, we know this won't inevitably help.