Poor guy.

We were obviously meant to see how he was be manipulated by both sides. Angela calling him her 'favourite son' which could be true, she's always seen peter as a bit of a flake and Gabriel does seem to live up to her evil expectations. Then being told by his dad that she tried to kill him after seeing one of her visions.

Arthur didn't take Sylar's powers so he obviously has big plans for him and arty thinks all is going to plan but I reckon S is playing double agent and will double, double cross his father in the end.

How did you see it?

I think Sylar is playing Arthur. I mean, Peter fell 7 stories, and Gabriel was just like.. "Yeah whatever." I think this indicates he helped at least a little. Maybe he wants to see what his father has in store before he takes Daddy's power or attempts to.

and before sending peter out the windows he says "I'm sorry, peter, this is something I have to do." like hiro before faking stab ando in angels and monster...