Optimus Prime finding his home planet, Cybertron, now a dead planet, which he comes to find he was responsible for killing. He finds a way to bring the planet back to life, but in order to do so he needs to find an artifact, and that artifact is on Earth.

Fourth part of the Transformers series, which starts a new main characters changing history.

Sam Witwicky takes his first tenuous steps into adulthood while remaining a reluctant human ally of Autobot-leader Optimus Prime. The film centers around the space race between the USSR and the USA, suggesting there was a hidden Transformers role in it all that remains one of the planet's most dangerous secrets.

Sam Witwicky leaves the Autobots behind for a normal life. But when his mind is filled with cryptic symbols, the Decepticons target him and he is dragged back into the Transformers' war.

Young teenager Sam Witwicky becomes involved in the ancient struggle between two extraterrestrial factions of transforming robots, the heroic Autobots and the evil Decepticons. Sam holds the clue to unimaginable power and the Decepticons will stop at nothing to retrieve it.

Lincoln Six-Echo is a resident of a seemingly Utopian but contained facility in the mid 21st century. Lincoln hopes to be chosen to go to the "The Island" the last uncontaminated spot on the planet. But Lincoln soon discovers that everything about his existence is a lie.

An asteroid the size of Texas is heading directly toward Earth at 22,000 mph. NASA's executive director, Dan Truman, has only one option - to send up a crew to destroy the asteroid. He enlists the help of Harry S. Stamper - the world's foremost deep core oil driller - and Stamper's roughneck team of drillers to land on the asteroid, drill into its surface, and drop a nuclear device.