Matt has a lot more experience with his abilities so figured out how to regain control. It's becoming a genuine power struggle now. As Sylar says, he's the one without rules and he doesn't hesitate to kill. Sylar takes Matt back to Charlie's café and what's interesting – Sylar now remembers the revised history – he 'tried' to kill a waitress here once. Very gutsy of Matt to stop Sylar whatever it takes – killing himself kills Sylar – suicide by cop.
Nathan's back and connected instantly with his flying power.
Peter's new healing power works great with his paramedic duties but it's very hard on him. At this rate, he's going to collapse.
Claire's feelings for Gretchen are surprisingly strong. For someone who wants a relationship with Claire, she runs at the first sign of trouble. Granted, it's a homicidal maniac, but if she wants Claire, Gretchen has to fight for her.
Noah's past actions come back to haunt him, as they have before. Noah killed Becky's father and she wants revenge. Danko got the compass from Joseph. Why did Samuel save Noah? Though stopping Becky does buy good will from Noah, letting them escape.
Emma accidentally let her nephew drown. Explains why she doesn't trust herself to be a doctor.
The episode ends with what I love most about the series – Nathan and Peter together.