largely divided into two classes. In the skies are electrical storms, which cannot be passed through without losing one's memories. Above them lies the realm of the wealthy and powerful, who barter others' bodies and memories for their own enjoyment and longevity. Below the clouds is a troubled and dangerous world where good bodies are hard to come by and real money is scarce. In the television series Caprica (2009–2010), a prequel to Battlestar Galactica, the ability to upload human consciousnesses into a virtual reality world is featured prominently. (Battlestar Galactica did not itself feature true mind uploading, since the cylons were artificial intelligences that were not based on ordinary human brains, though their minds could be transferred from one body to another in the same manner as is often envisioned for uploads.) While some characters believe that the process only creates an imperfect copy of the original person, as the death of the original consciousness is unnecessary for the creation of the virtual copy, other characters believe that it can be viewed as a form of religious rebirth analogous to the afterlife. Mind transfer is a central theme in the television series Dollhouse (2009–2010). In the anime series Serial Experiments Lain, the antagonist Masami Eiri embeds his memories and consciousness into the "Wired", the internet of the story universe. He believed that humanity should evolve by ridding themselves of their physical limitations and live as digital entities only. In the second installment of the story The Trial of a Time Lord in the original Doctor Who series, the Doctor's assistant Perpugilliam Brown has her mind erased, and replaced with the mind of the dying Lord Kiv of the Mentors. The storyline mentions that this is the first time the entire mind of an individual can be transplanted from one body to another. It is a pivotal moment in the history of the series as it is the purported reason that the Time Lords took the Doctor out of time and placed him on trial. It was later shown to be false evidence in the Doctor's trial. In the episode Silence in the Library of the 2005 revival of the British television show Doctor Who Donna Noble is "saved" by the computer Cal where she joins several others inside the computer that had been saved previously. Arguably the process of saving the individuals is more involved then simple mind uploading