People who are around are David Tennant, David Morrisey (speculated to be the "Other Doctor") and the woman who we believe is the new companion, now known to be called Rosita and is being played by Velile Tshabalala
A funeral is taking place as the Doctor walks past. A Cyber-wraith is driving the carriage (though the Doctor obviously doesn't know that)
And here's a video of it, with thanks to Murray-Mint
(which might possibly now be called Cyber-Shades)
In another scene, DM and Rosita run along a street, they stop and DM says:
"The Doctor's companion will do what the Doctor says! Now go!"
The Doctor watches all this going on...
And at some point, the Doctor meets up with Morrisey. Although I don't know if this is before or after the previous scene.
(Much much thanks to mirandamayhem, Murray-Mint and spillathecyberman)