they downloaded a different memory in the guy?

Construction worker Douglas Quaid's obsession with the planet Mars leads him to visit Recall, a company that manufactures memories. When his memory implant goes wrong, Doug can no longer be sure what is and isn't reality.

Factory worker Doug Quaid takes a virtual mind-trip vacation with the Rekall company, opting for implanted memories of being a spy. When the procedure goes wrong, Quaid becomes a wanted man by the police and joins forces with a rebel fighter to stop the evil Chancellor Cohaagen.

Cobb, a skilled thief who commits corporate espionage by infiltrating the subconscious of his targets is offered a chance to regain his old life as payment for a task considered to be impossible: "inception", the implantation of another person's idea into a target's subconscious.

This "Inception" prequel unfolds courtesy of a beautiful Motion Comic, and explains how Cobb, Arthur and Nash were enlisted by Cobol Engineering.

A young man struggles to access sublimated childhood memories. He finds a technique that allows him to travel back into the past, to occupy his childhood body and change history. However, he soon finds that every change he makes has unexpected consequences.

After his girlfriend, Julie, and two best friends are killed in a tragic auto accident, Nick struggles to cope with his loss and grief. Suffering from migraine-like seizures, Nick soon discovers that he has the power to change the past via his memories. However, his time-traveling attempts to alter the past and save his one true love have unexpected and dire consequences.

John Anderton is a top 'Precrime' cop in the late-21st century, when technology can predict crimes before they're committed. But Anderton becomes the quarry when another investigator targets him for a murder charge.

Ten years after the demise of Precrime, crime-solving is different and justice leans more on sophisticated and trusted technology than on the instincts of the precogs—individuals who able to see the future. In Washington, D.C., a man haunted by the future and a cop haunted by her past race to stop the worst crimes of the year 2065 before they happen.

Joel Barish, heartbroken that his girlfriend underwent a procedure to erase him from her memory, decides to do the same. However, as he watches his memories of her fade away, he realises that he still loves her, and may be too late to correct his mistake.