Tv Series: Format

So thinking about the format of my show I've realised that it isn't unlike the format of the classic Doctor Who series, which would have contained a total of about 6 separate stories each story would span across several episodes, for example the first story that was shown by the series 'An Unearthly Child' was 4 episodes long in total, while the second story to be produced, 'The Daleks' was a 7 part story, this isn't unlike the format of my show where the first story 'An adventure in Cowsmead' has 3 parts while the second 'Blood on the Snow' is 4 parts.