Robot Trains (2015)

S1E32 To the New World

As all trains make a hasty retreat to Area V, the Robot Trains seal off the tunnel leading to Fountain Plaza. However, Duke’s duplicates manage to break through, threatening the safety of those in Area V. Just as chaos unfolds, Duke arrives at Area V. It’s revealed that Becky had released Duke while everyone else was evacuating. The only force capable of halting Duke's duplicates is the power emitted by the Alpha Train.