Watch Doctor Who Confidential Season 4 Episode 5 Online
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- COUNTRIES: United Kingdom
- Subtitles: English
For the first time in over 20 years, the Sontarans are back as Confidential explores the return of the ultimate warrior race. We speak to David Tennant and Colin Baker and go behind the scenes to look at the explosive Sontaran Invasion against U.N.I.T. forces.