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

[Q]: Let's have some flashback about S04E04,  When a white walker brings one of Craster's son to Night King. So, the scene goes like this,   [WikiPedia] Later, a White Walker retrieves Craster's son. The Walker travels to the White Walkers' fortress in the Lands of Always Winter and lays the child on an altar made of ice. The leader of the White Walkers, the Night King, approaches and places his hand on the boy, transforming him into a White Walker.   So, they've shown that the Night King can convert living into white walkers by just touching them.   But in S08E03, it didn't seem to be the case when Arya approached the Night King to kill him.  The question is, How is Arya not transformed into a White Walker when the Night King grabs her by the neck?
[A]: How did Arya survive this confrontation unscathed?


[Q]: In the movie Terminator Genisys, they show that the series of events from the first terminator never happens. This is an alternate timeline. They also destroy subsequent chips from other terminators. How does Skynet get built then? Isn't the existence of Skynet based on the result of the Predestination paradox? If they didn't have the machine chip, by who and how does Skynet get created?
[A]: How does Skynet get created in Terminator Genisys?


[Q]: So I just finished watching the first episode of the fifth season of The Walking Dead and    in the first five minutes of the episode, Rick gets hit in the head and passes out.   Rick is a tough guy, was in the police forces and can take a beating, that we know, but how can a man survive that much head trauma and still be able to talk or act normally.     The timeline we are currently in is not that long after the Governor destroy the prison and there again, Rick got hit in the head several time, almost killing him.   But everytime, he manages to get up again and carry on like "everything is fine".  Maybe I'm too demanding for a show based on a zombie apocalypse, but still, how is it that none of those injuries has left any permanent damages.
[A]:
Head injuries in the Walking Dead


