Continuity: After the Special Weapons Dalek blows up the gate to Ratcliffe's warehouse, you can see that some of the Daleks were slightly damaged by the explosion. In all the following shots, they have been repaired.

Factual error: The events depicted are supposed to have taken place at the time of the broadcast of the first Doctor Who Story...Saturday 23rd November 1963 at 5:15pm. However, the non-wintry weather and the bright evenings don't fit late November/early December.

Visible crew/equipment: At the beginning of the episode when the soldier is thrown back after being exterminated, the wire pulling him is very visible.