Mohinder's apartment, Tina's house and the Bennets' house are all rather different sets than in the previous episode. In particular, the Bennets seem to be much wealthier now.
While the detectives are arresting Hiro in Isaac's apartment, they hear the explosion before the shock wave hits, but the shock wave would travel faster than sound.
When Hiro is walking in downtown Manhattan, he passes a Carl's Jr restaurant sign. Carl's Jr. is a fast food chain located on the west coast. On the east coast, it is named "Hardee's"
The registration for the Cadillac shows it as being a 1966 model. This car is actually a 1959 Cadillac Series 62 convertible.
Eden calls a flash drive a hard drive.