Elliot wakes up in Tyrell’s SUV with no sign of Tyrell. This "zero day" gap becomes a massive mystery for Season 2.
The 5/9 hack was successful. We see the immediate fallout: global financial collapse, people cheering in the streets, and E-Corp EVP James Plouffe committing suicide on live TV.
The music in this episode is legendary for its "end of the world" energy:
Mr Robot episode 10 review: eps1.9_zer0-day.avi | Den of Geek