Robot: | ||
 | ep 1 – | When the Doctor chops a brick in half, you can tell it's really made from balsa wood by listening to the sound it makes when it hits the ground. |
| ep 1-4 – | Benton is a Warrant Officer in this story, but the end credits refer to him as "Sergeant Benton". |
 | ep 2 – | When the Doctor types a note at super-fast speed for Sarah, he types only a couple of lines before pulling the page out of the typewriter. Yet when Sarah later reads the note, we see that the typing covers the whole page. (Plus, it's in a strange multi-spaced way, which doesn't correspond with the Doctor's typing either) |
| ep 3 – | The robot has lots of trouble breaking through the door when escaping from Kettlewell's lab, especially considering it was strong enough to push over a pillar in the lab earlier. Then, when moving past the line of soldiers, it loses its footing and almost trips over! |
| ep 3 – | When a UNIT soldier throws a grenade to knock out one of the bunker's machine-gun nests, it can be clearly seen to hit a tree branch and drop to the ground just a few yards away from him — nowhere near the explosion a few seconds later! |
| ep 4 – | A UNIT soldier climbing up a grassy slope to escape from the giant-sized robot slips and almost falls over. |