Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[Q]: In Person of Interest, in "The Day The World Went Away", Finch's cover identity is exposed after he visited a cafe he brought Grace to. How did Samaritan establish the link between Professor Whistler and Harold Finch? As far as I know, Samaritan knows:   A person who looks like Finch used to come to the cafe A person who looks like Finch used to order the same thing   That, to me, is not enough to conclusively prove that Professor Whistler is indeed Harold Finch. What other information could Samaritan possibly possess to help it expose Finch's cover identity? Was it the fact that Finch was talking to The Machine?
[A]: How did Finch's cover identity get blown?


[Q]: As shown in the movie Persephone was the wife of The Merovingian, who himself was an obsolete program who denied being deleted. My question is, does anybody know anything about the origins of Persephone? There seems to be no specific information that indicates who she previously was.
[A]: What were the origins of Persephone in The Matrix: Reloaded?


[Q]: Well I haven't watched Doctor Strange yet, nor any of the movies in the Marvel series, and I was wondering if I can watch Dr. Strange without getting lost about the storyline in case I need to watch some other movie to have an idea of what is going on.
[A]:
Is the movie 'Doctor Strange' related to any of the Marvel movies?