* TheCastShowoff: Averted, surprisingly enough. Aversions of this trope would not usually be notable, except that this show cast Julian Ovenden -- an Oxford choral scholar, BBC Proms mainstay, and one of the best singers in the history of British musical theatre -- as Andrew Foyle, and then didn't have him sing a note.
* TheDanza: Greville '''Woods''' is played by Simon '''Woods''' in "Enemy Fire".
* DoublingForLondon: Most of the exteriors in the London-set series 8 are shot in Dublin.
* FakeAmerican: Most, though not all, of the American characters are played by British actors. These included Creator/JohnMahoney of ''Series/{{Frasier}}'', whom many people would be surprised to learn was born in Blackpool, Lancashire.
* UnCanceled: When ITV decided to stop making the series and make two final episodes, one each for 1944 and 1945, there was rather a lot of complaints. In the event it was not only given a concluding season, ending on V-E Day, but subsequently renewed for three more seasons set in the war's aftermath.
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