write by the writer who pen the excellent murder room series which chronicle acd adventure with doctor joseph bell and i be look forward to this and i wasn not disappoint . it be quite slow moving and with a lot of emphasis on doyle frustration at sherlock holmes which be very accurate and excellently portray . it be an interesting character study and very well shot ( on digital video and unusual for a period piece ) . the acting be excellent all round and particularly tim mcinnery and brian cox although the actor who portray acd and whose name i can not remember impressed me no end . an excellent character study which have about the same amount of twist a any normal sherlock holmes case . do see this if you get the chance .