5-th episode of 4-th season "Doctor Who Confidential"

What "Doctor Who Confidential" 5-th episode about

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.

Episode number: 5

Episode name: "Sontar-Ha!"

Episode release date: 3 may 2008 at 19:45

Status: aired