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?
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Q: As anyone who has seen the movie will tell you, the Eraserhead baby is the stuff of nightmares.     The baby itself is famous for being somewhat of a mystery. David lynch refuses to discus the baby, what it is, how it was created, or why it's so gosh darn creepy. The few comments he has made have been cryptic. Statements such as "it was born nearby" or "maybe it was found" have lead to rampant speculation including theories that it could possibly be such things as a skinned rabbit or a cow, lamb, or even human fetus.  The prop itself, nicknamed "Spike", featured several working parts making its eyes, mouth, and ears capable of independent operation.  What is the baby actually made of and what evidence do we have to prove this?

A: What is the Eraserhead baby?
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Q: In Red Sparrow Dominika Egorova attacked a fellow cadet, who tried to rape her.  Later, Matron calls the fellow cadet and her. Matron says to her:    For the deception to be complete, you must hold nothing back. Nothing.  Understand? Give him what he wants.   What deception is Matron referring to?

A:
Which deception is Matron referring to?
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