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Doctor Who · S4E5 — The Poison Sky (2)
Season 4 episodes
1. Partners in CrimeApr 5, 2008
2. The Fires of PompeiiApr 12, 2008
3. Planet of the OodApr 19, 2008
4. The Sontaran Stratagem (1)Apr 26, 2008
5. The Poison Sky (2)May 3, 2008
6. The Doctor's DaughterMay 10, 2008
7. The Unicorn and the WaspMay 17, 2008
8. Silence in the Library (1)May 31, 2008
9. Forest of the Dead (2)Jun 7, 2008
10. MidnightJun 14, 2008
11. Turn LeftJun 21, 2008
12. The Stolen Earth (1)Jun 28, 2008
13. Journey's End (2)Jul 5, 2008Synopsis
The Sontarans press onward with their malevolent scheme, initiating a systematic constriction of the planet. With Martha now joining them, the Doctor and Donna must intervene. Can they avert disaster and safeguard Earth before the process is irreversible?
