1. Momentum. The Flyers are coming off a thrilling overtime victory. They are back in the series. They will have the home crowd urging them on. They have plenty in their favor, despite being down, 2-1.
2. Special teams. The Flyers were 2-for-3 on the power play in Game 3 and killed all three Blackhawks power plays. Winner of the special-teams battle usually is the winner of the hockey game.
3. Top guns. Does the Mike Richards-Jeff Carter-Simon Gagne unit finally have a big game, or does Chicago's Jonathan Toews-Patrick Kane-Dustin Byfuglien break the Flyers' hearts?