Derek RobertsonDerek Robertson Selective FilmographyKilljoys(2015)Writing creditsWriter (10 episodes, 2016)Defiance(2013)Assistant directorAssistant director (4 episodes, 2014)Other crewAssistant production coordinator (5 episodes, 2014)The Day of the Triffids(2009)Visual effectsVisual effects coordinator (Unknown episodes, 2009)(*) uncredited