Downton Abbey Guest cast, played by Brendan Patricks Episode 1x03: Episode 3 (Oct 10, 2010) Episode 1x07: Episode 7 (Nov 7, 2010) Episode 4x05: Episode 5 (Oct 20, 2013) Episode 4x06: Episode 6 (Oct 27, 2013) Episode 4x07: Episode 7 (Nov 3, 2013) Episode 4x08: Episode 8 (Nov 10, 2013) Episode 6x06: Episode 6 (Oct 25, 2015)