All three actors haves appeared on Doctor Who: Brian Cox: as Elder Ood, The End of Time (2009). John Simm: as Harold Saxon/The Master, Utopia (s3 e11), The Sound of Drums (s3 e12), Last of the Time Lords (s3 e13), The End of Time (2009-10), World Enough and Time (s10 e11), The Doctor Falls (s10 e12). Shaun Parkes: as Zachary Cross Flane, The Impossible Planet (s2 e8), The Satan Pit (s2 e9)