《回到未来3》电影剧情紧凑，扣人心弦，是一部极具科幻想象力的电影。这部电影由罗伯特·泽米吉斯执导，迈克尔·J·福克斯,克里斯托弗·洛伊德,玛丽·斯汀伯根,托马斯·F·威尔森,莉·汤普森,伊丽莎白·苏主演，讲述了马丁乘坐时空穿梭机回到1885年的美国西部，试图阻止他的好友埃米博士在未来被杀害的故事。

马丁本以为可以乘坐着时空穿梭机回到未来，但却在追寻埃米博士的过程中发现了博士的墓碑。为了挽救好友的性命，他不得不与1885年的美国西部恶势力展开一场惊险刺激的决斗，期间还结识了一位美丽的女牛仔，他们的感情也在冒险中得以升华。

在这部电影中，马丁化身为勇敢的英雄，不断挑战自我，勇敢地面对一切挑战。他的举止和言谈也让人不禁为之动容。电影通过精彩的剧情和场景，展现了人类的智慧和勇气，让观众在欣赏电影的同时也深受启发。

The protagonist of the story is still Martin, but Martin did not travel to 2015, but returned to 1955. He found the letter left by his good friend Dr. Amy in 1885, and found the time machine he made. He thought he could go back to the future with the time machine, but accidentally found the doctor's tombstone by the window. After writing that letter, he was discovered by bad guys soon after, and he planted a time machine and was killed. Martin couldn't bear his good friend to die like this. According to the letter 70 years ago, he was determined to save Amir. He and the doctor found the time machine in 1955. He was hiding in a secret mine. After a long time, the time machine was finally dug out. According to the guidance of the doctor, Martin and the time machine came to the west of 1885. Here, they met criminal gangs, exposed their conspiracy, and fought with them. In the end, Martin Beat them and save the doctor's life