In 1973, Doctor Who was shot in color, but copies of episodes weren't always kept. Eventually, the BBC decided that they did want complete copies of old Doctor Who stories, but couldn't find one for the third part of "Planet of the Daleks." They did, however, have a black and white one. This incredibly interesting supplemental piece on the set goes into how two different techniques were used to colorize the third episode. Rather than the colorization being old school, wholly apparent, and completely disappointing, with this episode, if one didn't know that it had been colorized they wouldn't be able to identify it as in any way different from the rest. And, even if one does know they still may not be able to tell. It is truly an incredible process and a testament to the work that was done to get these stories from the Pertwee years ready for DVD. Though not always perfect, all the episodes look and sound extremely good.
It may have been a mistake for these two stories from Doctor Who to be titled Dalek War, but it certainly will not be a mistake for fans of the show, those interested in old science fiction, or just good television to purchase them.