When Jack is listening to the phone call Behrooz had with Dina, there are some lines in the phone call that were not included in the original phone call in episode 7. The lines were "It's true...Tarick told me everything... -He was lying... -No...he wasn't..."
After Jack shoots the tire, Navi Araz crashes the car but we can see that the tire is intact.
Throughout the season they keep referring to the reactors going "critical". However, when a reactor is operating normally, it is said to be "critical". In other words, criticality is the normal operating condition for a nuclear reactor.