After watching last Monday’s episode of Heroes, I have a strong feeling that Peter has Nicki’s power.
I think this explains his loss of memory and the weird incident near the end of the episode where the tattoo changes on his arm while he is kissing the Irish woman.
Peter now has two different identities, just like Nicki. Now that leaves the possibility that Peter’s alter ego is the one who killed Hiro’s father.
You know it makes sense. It can also explain the re-introduction of Nicki into the show. I think they’re trying to elaborate more an her ability in the story, and what better way than to tie it in with Peter’s storyline.