The one where the Brigadier blows up the Silurians...
For the second time in as many stories, the Doctor is abducted by monsters while wearing a white smock, only this time the abductors don't try and make off in an ambulance, but through the wall! The scorch mark the Silurians leave after resealing the wall is rather lovely too. It looks like something you might see on the wall at the Tate Modern. Perhaps there's a market for Silurian art?
It's a shame the Silurians have become a generic monster race by episode 7. After the death of the Old Silurian, it seems the entire race of revived creatures bowed to the will of the bloodthirsty Young Silurian, who wobbles around proclaiming very proudly that he is the leader now. This new leader just wants to wipe out the apes and take back the planet, and his means of doing so is both extreme and unexpected.