Ponds 'die in hot Tardis'
The intrepid companions will be seen expiring this weekend after the Doctor ‘nips out to get some fags’.
But it is a hot, sunny day outside on the planet Zartan and the the Time Lord forgets to wind down the windows on the Tardis.
Show runner Stephen Moffatt said: “It’s a sad, cautionary tale. And so sadly ironic, of course, given their aquatic surname.”