A quick history lesson.
Previously, we had seen the Doctor say farewell to his companions, leaving him travelling on his own once again. A scene with the Cybermen in the TARDIS was replaced by a short trailer which teased the audience with the returning silver giants. News of David Tennant's departure and the intriguing title drew viewers in with fans debating about what this could all mean and could guest actor David Morrissey in fact be the new incarnation of the Time Lord? Unfortunately, this strategy would have disastrous consequences on the story presented.
In 2007 a new Transformers movie was released and in 2009 Michael Bay would return to direct a sequel. The Cyberking feels like an attempt to plug that gap between the two movies, trying to deliver a memorable moment for kids watching at home. But to anyone with a modicum of intelligence it makes no sense. Described as a "dreadnought-class ship" it looks nothing like a spaceship and is the sort of massive deviation from established history which Doctor Who usually avoids. It wasn't until 2010 when 'Flesh and Stone' attempted to explain away this catastrophic misstep. To avoid the Cyberking collapsing and obliterating the city underneath we are treated to an all too convenient Dimension Vault piece of nonsense.
Once again this story occurs at Christmas, much like 'The Unquiet Dead', instead of being Christmas influenced, so we have no Robot Santas or killer Christmas trees which is a shame. But even those references couldn't save what is an utterly abysmal episode, damaging the appeal of the modern Cybermen, teasing the audience because of a real world news story and sacrificing everything else to achieve it.
Tomorrow Patrick gets to experience The End of Time with a cliffhangover which will take him to New Years Day...