Moffat weighs in - has spoilers for the finale, so I'm only quoting the relevant non-spoilery bits:
Doctor Who writer Steven Moffat has hit back at Stephen Fry's criticism of the "infantilism" of British TV, defending the show as one for all the family.
Moffat said the "high end" show could not be compared with junk food.
He was speaking at a screening of the first part of the grand finale of this series of Doctor Who.
...
Asked about Fry's comments, Moffat said Fry was a big Doctor Who fan and joked he was trying to sound "grown up".
He said of Doctor Who: "It was designed specifically to be a family programme, that's what it's for.
"It's the junction between the children's programmes and the adults' programmes."