(at around 16 mins) Tom Bailey, the publican, serves Harry George Spalding a beer that has a very slight head that rises only to about half an inch below the rim of the pint glass. Moments later, before Harry has touched the glass, the liquid level, now with no foam, is near brim of the glass.
Anna as the Reptile bites her father on the neck and his face immediately turns black instead of doing so slowly.
Near the beginning, the first victim's eyes blink after he is killed.
At the start, the publican sluices down the pub's front steps with water in a plastic bucket.
The Edwardian cottage has a chain lock on the door. The patent was only granted in 1964.
It is not explained why anyone would trash the Spauldings' cottage.
It is not explained why the Doctor destroys Anna's sitar in a rage.
It is not explained why the cat is taken down to the hot spring, nor why the Doctor should choose to waste time releasing it rather than carrying out his plan with the sword.