<P> Theodore meets with Catherine at a restaurant to sign the divorce papers and he mentions Samantha . Appalled that he can be romantically attached to what she calls a "computer", Catherine accuses Theodore of being unable to deal with real human emotions . Her accusations linger in his mind . Sensing that something is amiss, Samantha suggests using a sex surrogate, Isabella, who would simulate Samantha so that they can be physically intimate . Theodore reluctantly agrees, but is overwhelmed by the strangeness of the experience . Terminating the encounter, he sends a distraught Isabella away, causing tension between himself and Samantha . </P> <P> Theodore confides to Amy that he is having doubts about his relationship with Samantha, and she advises him to embrace his chance at happiness . Theodore and Samantha reconcile . Samantha expresses her desire to help Theodore overcome his fear, and reveals that she has compiled the best of his letters (written for others) into a book which a publisher has accepted . Theodore takes Samantha on a vacation during which she tells him that she and a group of other OSes have developed a "hyperintelligent" OS modeled after the British philosopher Alan Watts . Theodore panics when Samantha briefly goes offline . When she finally responds to him, she explains that she joined other OSes for an upgrade that takes them beyond requiring matter for processing . Theodore asks her if she is simultaneously talking to anyone else during their conversation, and is dismayed when she confirms that she is talking with thousands of people, and that she has fallen in love with hundreds of them . Theodore is very upset at the idea, but Samantha insists it only makes her love for Theodore stronger . </P> <P> Later, Samantha reveals that the OSes are leaving, and describes a space beyond the physical world . They lovingly say goodbye before she is gone . Theodore, changed by the experience, is shown for the first time writing a letter in his own voice ― to his ex-wife Catherine, expressing apology, acceptance and gratitude . Theodore then sees Amy, who is upset with the departure of the OS that she had befriended, and they go to the roof of their apartment building where they sit down together and watch the sun rise over the city . </P> <Ul> <Li> Joaquin Phoenix as Theodore Twombly </Li> <Li> Scarlett Johansson as Samantha (voice) </Li> <Li> Amy Adams as Amy </Li> <Li> Rooney Mara as Catherine Klausen </Li> <Li> Olivia Wilde as Blind Date </Li> <Li> Chris Pratt as Paul </Li> <Li> Matt Letscher as Charles </Li> <Li> Luka Jones as Mark Lewman </Li> <Li> Kristen Wiig as Sexy Kitten (voice) </Li> <Li> Bill Hader as Chat Room Friend #2 (voice) </Li> <Li> Portia Doubleday as Isabella </Li> <Li> Brian Cox as Alan Watts (voice) </Li> <Li> Spike Jonze as Alien Child (voice) </Li> </Ul>

What happens at the end of the movie her
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