Plot
Cobb and Arthur are "extractors" who perform corporate espionage using experimental dream-sharing technology to infiltrate their targets' subconscious and extract information. Their latest target, Saito, is impressed with Cobb's ability to layer multiple dreams within each other. He offers to hire Cobb for the ostensibly impossible job of implanting an idea into a person's subconscious; performing "inception" on Robert Fischer, the son of Saito's competitor Maurice Fischer, with the idea to dissolve his father's company. In return, Saito promises to clear Cobb's criminal status, allowing him to return home to his children.
Cobb accepts the offer and assembles his team: a forger named Eames, a chemist named Yusuf, and a college student named Ariadne. Ariadne is tasked with designing the dream's architecture, something Cobb himself cannot do for fear of being sabotaged by his mind's projection of his late wife, Mal. Maurice Fischer dies, and the team sedates Robert Fischer into a three-layer shared dream on an airplane to America bought by Saito
Cast
Leonardo DiCaprio as Dom Cobb, a professional thief who specializes in conning secrets from his victims by infiltrating their dreams. DiCaprio was the first actor to be cast in the film.[16] Both Brad Pitt and Will Smith were offered the role, according to The Hollywood Reporter.[17] Cobb's role is compared to "the haunted widower in a Gothic romance".
Ken Watanabe as Saito, a Japanese businessman who employs Cobb for the team's mission. Nolan wrote the role with Watanabe in mind, as he wanted to work with him again after Batman Begins.[19]: 10 Inception is Watanabe's first work in a contemporary setting where his primary language is English. Watanabe tried to emphasize a different characteristic of Saito in every dream level: "First chapter in my castle, I pick up some hidden feelings of the cycle. It's magical, powerful and then the first dream. And back to the second chapter, in the old hotel, I pick up [being] sharp and more calm and smart and it's a little bit [of a] different process to make up the character of any movie".
Joseph Gordon-Levitt as Arthur, Cobb's partner who manages and researches the missions. Gordon-Levitt compared Arthur to the producer of Cobb's art, "the one saying, 'Okay, you have your vision; now I'm going to figure out how to make all the nuts and bolts work so you can do your thing'".[19]: 7 The actor did all but one of his stunt scenes and said the preparation "was a challenge and it would have to be for it to look real".[21] James Franco was in talks with Christopher Nolan to play Arthur, but was ultimately unavailable due to scheduling conflicts.
Production
Initially, Christopher Nolan wrote an 80-page treatment about dream-stealers.[8] Nolan had originally envisioned Inception as a horror film,[8] but eventually wrote it as a heist film even though he found that "traditionally [they] are very deliberately superficial in emotional terms."[31] Upon revisiting his script, he decided that basing it in that genre did not work because the story "relies so heavily on the idea of the interior state, the idea of dream and memory. I realized I needed to raise the emotional stakes."
Nolan worked on the script for nine to ten years.[16] When he first started thinking about making the film, Nolan was influenced by "that era of movies where you had The Matrix (1999), you had Dark City (1998), you had The Thirteenth Floor (1999) and, to a certain extent, you had Memento (2000), too. They were based in the principles that the world around you might not be real."
