Question: What Dr. Who episode was based on a short story written by Moffat entitled "'What I Did on My Christmas Holidays' By Sally Sparrow" included a Weeping Angel?
Sentence (from "Weeping Angel"): Steven Moffat, their creator, attributes their appeal to childhood games such as Grandmother's Footsteps and the notion that every statue might secretly be a disguised Weeping Angel.
Relevant evidence: No