Audio problem: Jack "hypnotises" Chase in the bar to make him apologise to Merritt and slaps Chase on the face to wake him back up again. Chase then says "Merritt", but his lips don't move. (00:49:00)
Audio problem: In the bar, when Chase is telling Merritt his ploy of distracting him while the other Horsemen screw over Walter isn't going to work, whenever the shot is behind Chase, Chase's mouth movements do not match the dialogue when he is speaking. (00:48:35)
Continuity mistake: When the Horsemen arrive at the Macau Science Centre, Allen Scott-Frank tries talking with the South African gangster and is ignored. The gangster rolls up the window and the shot cuts to the Horsemen. Daniel is shown looking towards Merritt, but when Allen says "or not" in the next shot, Daniel is suddenly looking at Allen. (00:54:05)
Audio problem: When the Horsemen are at the science centre and are posing as doctors attempting to trick Allen, Lula says she did sent that e-mail and Daniel says "The other day, yes", but Daniel's lips do not move with the line. (00:55:10)
Visible crew/equipment: The remote controlled camera is visible in the scene where the truck full of the horsemen is pulling into the garage. Look as the camera pans down and we see the top of the van. The camera looks like a box attached to some poles.
Continuity mistake: When Jack is showing Merritt how to throw cards, just after he throws the last card, Merritt says "Not bad" looking straight forward at the card, but in the next shot, Merritt is looking at Jack. (00:12:40)
Continuity mistake: When the security guard at the OCTA launch finds the Evans Mental Facility wristband on the CCTV guard's wrist, the wristband and wrist are pointed away from the CCTV guard's face, but in the next shot, the wristband and wrist is directly facing the CCTV guard. (00:18:10)
Continuity mistake: When Daniel is performing in London, there is a wide angle shown in the scene, with Daniel under blue lighting. In all other shots in the scene, he is under white stage light.
Answer: The only ones who knew the chip was fake were the Horsemen, no one else did. Walter did not know the chip was fake. The plan was to convince Walter that the chip was real so that they could lure him out of hiding with Walter attempting to kidnap and later kill them, and expose Walter to the public in doing so. They told the crowd after exposing Walter about the chip, because while it was a fake, they still had plans with it assuming it was real. If by "alert the FBI", you were referring to when Dylan gave the FBI director the evidence on Walter and Tressler, that was not the chip he gave to her, that was a hard drive containing all of Walter and Tressler's past dealings.
Casual Person