Doctor Who · Season 4, Episode 5
Doctor Who Season 4 Episode 5: The Poison Sky
About Doctor Who: Adventures across time and space with the time travelling alien and companions.
More from Season 4
Season 4, Episode 1: Partners in Crime Season 4, Episode 2: The Fires of Pompeii Season 4, Episode 3: Planet of the Ood Season 4, Episode 4: The Sontaran Stratagem Season 4, Episode 6: The Doctor's Daughter Season 4, Episode 7: The Unicorn and the Wasp Season 4, Episode 8: Silence in the Library Season 4, Episode 9: Forest of the Dead Season 4, Episode 10: Midnight Season 4, Episode 11: Turn Left Season 4, Episode 12: The Stolen Earth Season 4, Episode 13: Journey's End