S4, E14: Sylar (Zachary Quinto) returns to the Carnival in search of answers and Peter (Milo Ventimiglia) continues to struggle with the loss of his brother. Elsewhere, H.R.G. (Jack Coleman) sets his plan in motion to take down the carnival. Cristine Rose also stars. David H. Lawrence XVII, Ray Park, Dawn Olivieri, Elisabeth Rohm and Dawn-Lyen Gardner guest star.