Continuity mistake: Hannah leaves the house in a Ford Fusion. In the next scene she is on the highway in a Toyota Camry. (00:26:50 - 00:27:50)

Character mistake: In the 11/14/2005 US Army Rangers report about Peter MacLeish, the word captain right under MacLeish's signature is misspelled "captian."
Answer: It's a recurring theme on the show. Characters come and go depending on the storyline. General Cochrane, Tyler Richmond, Abe Leonard, etc.