Goof: When Potts is reading the graffiti in prison, the wall clearly moves as he taps it.
Goof: Private Potts finds notes for Churchill's speech "Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning." That speech was delivered in November 1942, but this story takes place in 1941. Surely Churchill did not prepare his notable speeches that far in advance.