S4E19
Brave New World
⚠ Spoiler alert This recap gives away what happens in this episode.
Episode Summary & Review
Aired 2010-02-08 on NBC.
In the climactic season finale, everyone bands together in an effort 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.