xboy614 said:

been watching a the first and second season of bones and some of the cases are a bit like Castle. The one in Castle where the murderers decide to kill each others person, is a close to a part in Bones where three people decide to swap around the people they are wanting to kill and to make it look like a serial killer. There is also an episode in Bones and an episode in Castle where they both have  a thing about Aliens, and with a group who believe there are extra-terrestrials out there. Is a castle copying bones?  I hope not

The "you kill mine, I'll kill yours" is also a book and at least two movies… the writers of Bones did not invent the plot, nor the aliens. On Castle, the episode about aliens was a tribute to X-files (many on the Castle crew worked on X-files before). There are only so many stories out there, there are bound to be similarities sooner or later.