I don't know about favourite era but the inconsistency of UK Gold's scheduling at the moment is all too apparent , they were showing two episodes from series 17 followed by one from 27 then Friday its more from 17 but none from 27 , then next week it goes to some of 18 then misses 19 out totally and skips to 20 . I can only think it is something to do with the rights there is nothing in 19 that I can see that would prevent broadcast . The channels we see it on are Gold, Yesterday and Drama all owned in part by BBC Worldwide so technically , if the BEEB still own the rights they could show any episode . I just wish they would show them chronologically rather than cherry pick episodes/series.