Corrected entry: Romana gives the TARDIS's weight as five million kilograms in the planet's gravity. This is totally inconsistent with the TARDIS's weight in the rest of the series - for instance, in the third Doctor's time, a few soldiers were enough to lift it. And it can't be because of the planet having high gravity, as the Doctor and Romana would have been killed and K-9 crushed whenever they went outside the TARDIS.
Corrected entry: Davros is supposed to be a brilliant scientist, solely responsible for the creation of The Daleks and their programming. Programming The Daleks to accept him as their leader would be the absolute first thing he would do, and it's clear that the Davros death scene was only done for dramatic effect. (00:21:35)
Corrected entry: Neutron stars are one step away from being Black Holes. Anything such as Erato's ship approaching one would be dragged down to its surface and instantly crushed by enormous gravitational forces. It is therefore impossible to catch a Neutron Star in a net...
Corrected entry: Neither the humans nor Spiders use the word "Spider", instead referring to them as "Eight-Legs". But when the colonists go off to attack the Spider lair, you can hear some of the extras shouting "Death to the Spiders" instead of "Death to the Eight-Legs".
Corrected entry: We know the episode takes place on 23 November, 1963 because the first episode of Doctor Who is about to come on TV when Ace leaves the room. JFK was assassinated less than 24 hours ago, and nobody seems to be affected. Granted, the military characters have other things on their minds, but none of the civilians wear black armbands or even mention that the biggest news story of the year that just happened.
Corrected entry: The chart of the radiation on the island is wrong. The dialogue says it has steadily decreased over the past 172 years then suddenly disappeared. But the chart says it initially dropped rapidly for a few years, then started to fall at a slower rate for about a hundred years, then changed again and dropped to zero over fifty years. However, the way radiation disperses is anything but steady. It will continually slow down in its dispersal, forming a curve on a graph.
Corrected entry: The Nuton power complex contains a cyclotron which, Winser explains, can accelerate atomic particles to the speed of light and beyond. There's even an instrument which measures the effect, with a scale marked in "x light". Unfortunately, relativity states that you can't accelerate particles to the speed of light (let alone beyond it), because at that point the particles would have infinite mass.
Corrected entry: The Brigadier met the Doctor previously in 'The Web of Fear' and 'The Invasion', both Second Doctor (Patrick Troughton) stories. In 'The Web of Fear', the TARDIS was trapped in the tunnels, not to be seen until the end of the story...and in 'The Invasion' the TARDIS was invisible. So how does the Brigdier know that the Police Box is anything but an emergency phone booth?