In reply to Phil1919:
Well, not very good. Mixed production values and low logic values. I think a dinosaur on the Thames might have attracted slightly more attention than the few extras available. Plot details like the spontaneous combustion fizzled out. It was a bit of a dog's breakfast.
Might watch it again solely for the promised appearance of Michelle Gomez. But then again maybe not if the tedious way-beyond-sell-by-date Daleks reappear