My favourite movie trilogies :
In the life of Marty McFly, all is not well. His family is dysfunctional, his school punctuality is questionable and the music he likes and plays is just too darn loud. His one true light is his girlfriend Jenny and his one true friend is the somewhat off-kilter Doctor Emmett Brown. In a request from Doctor Brown, Marty meets the mad scientist and discovers that his friend has built a time machine out of a DeLorean. From there, Marty's humdrum life becomes literally a blast from the past as he is transported to 1955. A stranger in a strange yet familiar land, Marty must seek out Doctor Brown to help send him back to his own time while simultaneously ensuring that his parents meet and fall in love.
Roger Murtaugh has just turned 50, and only has a few more years to go before he retires from the Los Angeles Police Department. Martin Riggs has just lost his wife in an accident, and doesn't care if he lives or dies. When they are paired together, Murtaugh has problems with Riggs suicidal attitude towards work, as they investigate a drugs baron dubbed "The General".
In ancient times the Rings of Power were crafted by the Elven-smiths, and Sauron, the Dark Lord, forged the One Ring, filling it with his own power so that he could rule all others. But the One Ring was taken from him, and though he sought it throughout Middle-Earth still it remained lost to him. After many ages it fell, by chance, into the hands of the Hobbit, Bilbo Baggins. On his eleventy-first birthday, Bilbo disappeared, bequeathing to his young nephew, Frodo, the Ruling Ring, and a perilous quest: to journey across Middle-Earth, deep into the shadow of the Dark Lord and destroy the Ring by casting it into the Cracks of Doom.
Luke Skywalker stays with his foster aunt and uncle on a farm on Tatooine. He is desperate to get off this planet and get to the Academy like his friends, but his uncle needs him for the next harvest. Meanwhile, an evil emperor has taken over the galaxy, and has constructed a formidable "Death Star" capable of destroying whole planets. Princess Leia, a leader in the resistance movement, acquires plans of the Death Star, places them in R2D2, a droid, and sends him off to find Obi-Wan Kenobi. Before he finds him, R2D2 ends up on Skywalkers' farm with his friend C3PO. R2 then wanders into the desert, and when Luke follows, they eventually come across Obi-Wan. Will Luke, Obi-Wan, and the two droids be able to destroy the Death Star, or will the Emperor rule forever ?
While returning from a deep-space mission, the crew of the commercial spaceship Nostromo is awakened by a supposed SOS call from a system they are passing through. Descending to the planet's surface, they discover a strange derelict spaceship - the apparent source of the transmission - and one of the crew descends into the hold. What he finds are thousands of strange alien eggs. While examining one of the eggs, it hatches and the parasite inside attacks him. After returning to the Nostromo the crew takes off again to head for Earth. The alien parasite subsequently dies and all seems well again. But what no one knows is that another alien is quietly forming within its host - and when it emerges, the crew finds itself in serious trouble...

John Rambo is a Vietnam Veteran, winner of the Medal of Honour for serving his country in the Vietnam war and the last surviving member of the unit he was in. Rambo arrives in a small town, where he is arrested by the abusive local Sheriff Will Teasle for refusing to leave town. Rambo is mistreated and he relives his painful memories of being tortured in a prison camp, which goes too far and Rambo escapes from police custody. Rambo is pursued by the Teasle and the local police into the woods and Rambo begins a personal war with Teasle, and uses his combat skills and hunts down Teasle and his men. Rambo's former commanding officer Colonel Samuel Trautman arrives believing Teasle and his men don't stand a chance with Rambo, and tries to put Rambo's personal war to a end, as Teasle wants Rambo dead.
7. Die Hard
Tough New York cop John McClane finds himself in a tight situation when an office building in Los Angeles is taken over by terrorists. Apart from himself, everyone else in the building - including his wife - is held at gunpoint while their captors spell out their demands. The F.B.I. are called in to survey the situation, but John McClane has other plans for the terrorists...