Plot hole: Those people created for medical experiments cannot run. In fact they can barely walk, so how come they can climb nearly as fast as Rose? What's more, when you see them climbing, they seem to have little ability to coordinate hand over hand. Even with the delay brought on by the cat-woman-thing, they should not have been able to keep up with her.
Doctor Who (2005)
1 plot hole in New Earth
More mistakes in Doctor Who
The Day of the Doctor - S7-E16
Eleventh Doctor: Gentlemen, we're ready. [Straightens bow-tie, throws lever on his TARDIS console.] Geronimo!
Tenth Doctor: [Theatrically throws lever on his TARDIS console.] Allons-y!
War Doctor: [Works controls on his TARDIS console, disgusted.] Oh, for God's sake! Gallifrey stands!
Trivia: In "Human Nature", when John Smith (The Doctor's human identity) is talking about his parents, he says their names are Sydney and Verity. Sydney Newman was the creator of Doctor Who and Verity Lambert was the first producer. (00:30:00)
Last of the Time Lords (3) - S3-E13
Question: Why does The Master fear The Doctor forgiving him? What's he forgiving The Master for exactly?
Chosen answer: The Master knows that deep down, he deserves death for the crimes that he's committed throughout his life, and since he regards The Doctor as his arch-foe, he expects it to be at his hands. The fact that The Doctor is still willing to forgive him after everything the Master's put him through hurts him more deeply than death would.
Captain Defenestrator