While preparing for a midterm exam in one of my classes, I was researching the Fisher King, referenced in T.S. Eliot's poem, The Waste Land. As I typed "Fisher King" in to Google, I saw a suggested search for "Fisher King Doctor Who." Since I am a Doctor Who fan, I decided to check it out.
Apparently, the Fisher King is from an episode titled Before the Flood. I looked at this page hoping to find some answers, but unfortunately, nothing was listed stating that it was a reference.
Could someone with more knowledge than I shed some light on the subject? For the record, I do not know very much about the revived Doctor Who series, as I am a fan of the old one, and have not seen any of the new ones yet because I am still working my way through the original.