The near-religious belief that the Doctor (Doctor Who) exists and does in fact save your life nearly every day. This belief arises from unexplained happy-coincidences, such as an unknown man catching a baby that fell 3 stories, or the oil from the 2009 spill disappearing. Subscribers to Doctorism are known as either Doctorites, Companions, or Neo-Whovians.
Doctorism at its best:
Ronny: "Hey, did you hear? That family that went missing a week ago turned up! No one knows how, and they don't really remember."
Joe: "It was the Doctor for sure! I knew he's real!"