
"Due to a manufacturing problem, Disc One of the Netflix copies of 'Doctor Who: The Complete Second Series' DVD collection contains incorrect footage from another film. The special features section on Disc One is also inaccessible on rented Netflix copies."
"This error is only found on Disc One of Netflix copies of the series, not on any Doctor Who DVDs available for purchase in stores. We are doing our best to rectify this problem as soon as possible and apologize for any inconvenience or distress."
Source:
The Register