Doctor Who · Season 10, Episode 4
Doctor Who Season 10 Episode 4: Knock Knock
About Doctor Who: Adventures across time and space with the time travelling alien and companions.
More from Season 10
Season 10, Episode 1: The Pilot Season 10, Episode 2: Smile Season 10, Episode 3: Thin Ice Season 10, Episode 5: Oxygen Season 10, Episode 6: Extremis Season 10, Episode 7: The Pyramid at the End of the World Season 10, Episode 8: The Lie of the Land Season 10, Episode 9: Empress of Mars Season 10, Episode 10: The Eaters of Light Season 10, Episode 11: World Enough and Time Season 10, Episode 12: The Doctor Falls