| Cast overview, first billed only: | |||
| Shah Rukh Khan | ... | Shekhar / G.One | |
| Arjun Rampal | ... | Ra.One | |
| Kareena Kapoor | ... | Sonia S. Subramanium | |
| Shahana Goswami | ... | Jenny Nayar | |
| Atul Sharma | ... | Airport Security Guard | |
| Priyanka Chopra | ... | The Desi Girl / Damsel in Distress | |
| Satish Shah | ... | Iyer | |
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Armaan Verma | ... | Prateek / Shekhar's Son |
| Dalip Tahil | ... | Barron | |
| Suresh Menon | ... | Taxi-Driver | |
| Sanjay Dutt | ... | Khalnayak | |
| Rajinikanth | ... | Chitti (as Rajnikanth) | |
| Joe Egan | ... | The Daddy | |
| Ben Hawkey | ... | Billy | |
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Alex Moore | ... | Dad |
Following his son's suggestion, Shekhar designs an action game where the antagonist is more powerful than the protagonist. The player has to fight in the first two levels to reach the third one where whoever fires the bullet first wins. The game is well-received on its opening night, but things go wrong when Prateek stops playing and quits the game in between, only to invite the wrath of Ra.One, the game's villain who uses an advanced technology to take on physical form. He wants to destroy Prateek, something only the game's protagonist, G.One, can prevent from happening. Written by Prashast Singh
Awful, awful, awful! I really don't know where to start??? Let's start with the ridiculous title of the film - Ra.one - Random Access One??? In the film Ra.one is a evil character from a computer game. One of the development team whilst brainstorming says that the name of the 'baddie' is obvious and it's 'staring them in the face'. Written on the White board as a title is Ra.one - Random Access One. Hence the name Ra.One. No, it's way over my head. I have no idea why it's so clear to name the character Random Access one. With great baddies like the Joker, Dr Octopus, Lex Luther, Dr Doom and now we can add Random Access One to the list.....not! The film has no coherent plot to speak of. I think they had a basic premise to work with and just made it up as they went along. Unnecessary crude jokes that are not funny and a very nasty, racist joke about Chinese people. Shah Rukh Khan must be extremely delusional to believe in this plot less, clueless, racist garbage is worthy of his name and time. How can an actor of his stature accept this job. Does he not read the script before hand? Oh yeah there wasn't a script. Utter tripe!