 A line spoken by the Doctor, "The angels have the phone box", is rhetorically repeated by Larry and prompts him to say "I've got that on a T-shirt".As expected by Moffat and Gold, this led online retailers such as ThinkGeek, and Zazzle, among others, to offer versions of such a product for sale.In addition, the "wibbly-wobbly timey-wimey" line has been used to describe several of Moffat's complex time travel stories, such as "Let's Kill Hitler" and "The Big Bang".