Author notes

637. 50th Anniversary Doctor Who Special 06: Rory Williams

Sameth

on Nov. 11, 2013

There is a running gag with the 11th Doctor and the Williams. The Doctor always refers to Amy and Rory as "The Ponds" after Amy and Rory got married. (In fact, The Doctor even referred to Rory's father as "Mr. Pond.") When in fact, they are now "The Williams."
There's another running gag with The Williams and that's that most people think Rory and Amy are siblings rather than husband and wife.