Question for Fans - SO CONFUSED

I just finished the volume one finale How to Stop an Exploding Man and now I'm trying to find a way to watch volume two premiere Four Months Later... except when I start Four Months Later... it begins with PREVIOUSLY ON HEROES and shows Hiro's Dad about to die and Hiro talking with the samurais but I never saw this??! What's going on I want to keep watching but I'm so confused

Please help me!