Flashbacks to Finch's adolescence provide insight into his creation of The Machine. Also, the team receives the number of an already dying man, and Reese leaves the POI team behind in the aftermath of the war with the crime organization.



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Episode cast overview, first billed only:
Agent Easton
Young Harold (1971)


During his physical recovery, Reese leaves without telling anyone, or where he is going. As such, Finch decides to ignore the Machine, which is trying to give him a new number. However, Finch can't ignore the indirect source of that next number, that source which may be more troubling to him. That number, which he will be working on with Shaw, belongs to Arthur Claypool. Shaw does not notice by Finch's reaction that he actually knows him. They are certain that Arthur is the intended target as he has a brain tumor and is not expected to live much longer. The tumor is causing his memory to go in various ways, such as not recognizing his long-term wife, Diane. What is more problematic is that Arthur is beginning to ramble. Finch and Shaw see that he is being protected by Secret Service which means that he has been working for a government agency probably on some top secret projects. Those ramblings are often about something called Samaritan, which they surmise is one of those secret ... Written by Huggo

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Release Date:

17 December 2013 (USA)  »

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Did You Know?


In Greek mythology, Lethe was one of the rivers of Hades it is also the word to forget. The next episode is Alethia, Greek for truth or unforgetfulness. See more »


The next to last scene shows the probabilities that the machine has calculated for the deaths of each of the characters. The machine indicates that Robert Hersh and Sameen Shaw are aliases, when it is likely that those are the real names of the characters -- especially for Shaw, since when she was a doctor in training she was referred to as Shaw, which would make it probable that that was her "real" name. See more »


Arthur Claypool: [about his wife] How come I remember you and not her?
Harold Finch: ecause tumors do mysterious things to memory. It's like you said. Your file system is corrupted.
Arthur Claypool: [Shakes his head] No. That's not it. I remember Diane. Diane is dead. I buried her two years ago, on June 12, 2011.
Sameen Shaw: You do remember.
[Turns to Diane]
Diane Claypool: I suppose this was inevitable. And seeing as how time is a luxury we no longer have - Hersh.
Hersh: Perimeter is secure, ma'am.
Sameen Shaw: Ma'am? He works for you?
Diane Claypool: As did you at one time, Agent Shaw. I assume you always...
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