Doctor Who Confidential (2005)

S4E5 Sontar-Ha!

After more than two decades, the Sontarans make their dramatic comeback as Confidential delves into the resurgence of this formidable warrior species. The episode features interviews with David Tennant and Colin Baker, offering a glimpse behind the curtain at the thrilling Sontaran invasion battling U.N.I.T. forces.