Marty was captured by these doppelgangers, but Emmett Brown managed to escape. He could still fly the DeLorean, as the flying circuits were untouched as Marcus was unaware of them. A doppelganger of Marty was outside the car, and Doc let him in. However, after he accidentally off the face, he realized that it was an android, rather than a person from an alternate timeline as he and Marty had originally assumed. He knocked the android out the window and went back to rescue Marty, who had been taken to Marcus Irving's hideout.
Doc used the technology from the android to trace the other androids, and discovers Marcus Irving's hideout and told Marty that the situation was not as it appeared. Doc incapacitated the other robots with the electric gun that Griff Tannen had used on him in 2035.
Marty and Doc then went to find the remaining android before it could do any harm, but they were too late. The faceless android knocked out Needles' gang with a knock out serum mixed with a memory clouding agent that made their memory hazy. It was doing the same to Needles himself, when Marty showed up to stop it.
Doc meanwhile, headed to the DeLorean, and found that Irving had repaired it, placing the flux capacitor back in place and replacing the tires. Doc tried to use a remote control override, when the aged Marcus Irving used the knock out serum on him.
- Androids from the future roam Hill Valley. They use a knock out serum mixed with a memory clouding agent on anyone who sees them.