Everyone bands together to try to stop Samuel from taking the lives of thousands. Peter joins forces with his most unexpected ally to save Emma. Meanwhile, H.R.G.'s life hangs in the balance as he and Claire find themselves trapped underground with oxygen quickly running out. Elsewhere, Hiro starts to come to grips with the decisions he has made and is called into action to help stop a disaster.
Quest roles:
Jayma Mays(Charlene "Charlie" Andrews), Ray Park(Edgar), Daryl Crittenden(Chris), Deanne Bray(Emma Coolidge), Harry Perry(Damian), Erin Allin O'Reilly(Gale), Kaleigh Ryan(Jennie), Elisabeth Rohm(Lauren Gilmore), Todd Stashwick(Eli), David H. Lawrence XVII(Eric Doyle), Kate Scott(Carnie Kid), Adam Lazarre-White(Ian Michaels), K Callan(Charlie Andrews), Allyson Roche(Sally), Jennie Fahn(Nurse), Charly Emery(Reporter #1), Shane Conrad(Reporter #2)