Alastair Bruce is the historical advisor for the Downton Abbey series. In the tradition of Alfred Hitchcock, he has had a cameo role in each of the four series to date. His appearance as Lord Chamberlain in the 2013 Christmas Special of series 4 was his first speaking part in the series.
Previously, in series 1 he appears as a butler in the Dower House, in series 2 as a soldier accompanying General Strutt, and in series 3 as the river ghillie and stalker for Duneagle Castle.