Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title
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Question: In Prometheus, for what reason did Weyland hide on the ship? When he finally revealed that he was in the ship, it turns out nothing happens, there are no particular consequences and the reason for the secrecy is unclear. Why didn't Weyland just inform the crew that he's also aboard in the ship?  Can someone explain to me, what are the reason for this?

Answer: Why does Weyland have to hide that he was on the ship?


Question: In the last episode of game of thrones, Sansa asks that the North becomes independent and Bran allows it.  Seeing this, Why didn't the other rulers ask for the same thing?   Especially Dorne and the Iron Islands.

Answer: Why didn't the other kingdoms want to be independent?


Question: In Interstellar, when Murph visits her brother and his wife, she notices that their son is coughing hard, and she offers to arrange a visit from a doctor for him. The brother and his wife refuse, however, even though she warns them their son will die otherwise.  Did it signify anything? I thought that maybe it signified that there is an anti-science movement because of the blight. The brother certainly seemed to dislike his father and sister's scientific pursuits.

Answer:
Why did Murph's brother and his wife refuse a doctor for their son in Interstellar?


