Sentinel Prime is an Autobot in the Dark of the Moon film.
Transformers: Dark of the MoonEdit
Sentinel Prime drove the Ark many years ago during the battle of Cybertron. The Decepticons shot the ship and hope was lost to the Autobots. In 1961, the United States found out an alien ship on the moon. President JFK, wanted astronauts to investigate. In 1969, the journey began, and the astronauts saw dead robots everywhere on the ship. Sentinel Prime was a the bottom and now the Autobots must find him. Optimus Prime wants Sentinel Prime to be alive, so Ratchet and Optimus Prime went to the moon and found Sentinel. They brought him back to Earth and Optimus stabbed Sentinel with the Maxtrix of Leadership. When Sentinel was alive, he said that he wantsthe pillars for his Space Bridge. The Autobots only had five, but the Decepticons had hundreds of them. When Sam Witwicky was attacked by Decepticons, he thought that they were after Sentinel, which they were. Sam was inside of Bumblebee, Ironhide, Sideswipe, and Sentinel were on the highway to the NEST base until four Decepticons attacked behind him. After all of the Decepticons were killed, Sentinel Prime transformed and said that he made a deal with Megatron for the survival of the Cybertronian race. So he killed Ironhide and went to the NEST base and started destroying everything.
At Washington D.C, Sentinel made the Space Bridge with the five pillars and Optimus Prime had to stop him, but couldn't. All of the dead robots in the Ark came alive and the Ark went to Earth and new Decepticons were made. The Autobots went inside a space shuttle because every human of the world said that it was Prime's fault that Decepticons were attacking them. The Autobots went inside and the space shuttle exploded because of Starscream.
At Chicago, where the final battle began, Sentinel decided that he should transport Cybertron to Earth. The Autobots arrived and Optimus said the excat words: "We're taking this war to them. We will kill them. We will kill them all!" The Autobots battled with the Decepticons. Optimus Prime confornted Sentinel Prime. Sentinel was winning, but Megatron came and shot Sentinel's back. Optimus Prime killed Megatron and started to finish Sentinel off. Sentinel Prime surrendered and Optimus said: "You didn't betray me Sentinel - you betrayed yourself." So Optimus Prime shot Sentinel's head and that was the end of the movie.
Sentinel Prime Leader Class
Sentinel Prime Voyager Class