As an Englishman, I'm finding this series extremely fascinating with London providing an interesting alternative to American locations used in preceding series. At the time of writing (up to and including Episode 5), London-specific attention to detail by the show's producers appears to be virtually faultless - one notable exception being the London Underground faux-pas in Episode 3.
While she and Jack are tracking terrorist Simone Al-Harazi from Kennington tube station, Chloe notices she's taken a northbound Northern Line train (the only line there). North of Kennington the Northern Line splits into two - the 'Charing Cross' and 'City' branches - and Chloe identifies Simone's train as the former. So far, so good.
Jack then drives them helter-skelter to the next stop Waterloo, where he dashes out into the underground to intercept the train... which, hey presto, is now JUBILEE LINE (Neasden-bound - as shown on the front of the train and as announced while stopped at Waterloo). OK, Simone could conceivably have changed trains from Northern to Jubilee at Waterloo but, as they're at opposite ends of the station's underground complex, that would involve an extremely long walk (or run) between the two. And of course, Chloe would have tracked all this and directed Jack accordingly (which she doesn't).
Of no real consequence perhaps, however I'm surprised they didn't use the Northern Line at Waterloo for continuity - or else show Simone making the long trek to the Jubilee platform, with Chloe providing Jack with a running commentary as she tracks Simone's movements via CCTV... which could all have added to the suspense (though obviously at the expense of other footage - probably not an option).
But hey... who's complaining? Love it!!!!
