chunk: The respective groups connected to the Transformers are gathered together at Hoover Dam by Sector Seven’s director Tom Banachek. Inside, the group discover the frozen Megatron and the AllSpark, but Frenzy, who smuggled away in Mikaela’s bag, summons the other Decepticons to attack. Bumblebee is released to protect the AllSpark, shrinking it down to a handheld size so it can be transported to safety. Megatron escapes the dam after thawing out. A lengthy battle occurs in Mission City (but was clearly filmed in Los Angeles), with most of the Decepticons being killed, but Megatron murders Jazz. He prevents Sam’s attempted escape with the AllSpark, and begins to fight Optimus. After a long brawl Megatron seems to get the upper hand. Optimus then tells Sam to push the cube into his chest, but Sam rams it into Megatron's chest instead, extinguishing his spark. Starscream is the only Decepticon to escape, but Barricade remains on Earth.