After a slightly uncertain start to this episode, featuring the long awaited return of the second most iconic Dr. Who monsters, it gets into its stride. The Doctor,Rose and Mickey find themselves in an alternate London, sending both Rose and Mickey on the trail of relatives that have long since died in their reality. Finally, we start to get an idea of what makes Mickey tick as his back story is filled in. Rose's desperation to see her father is a rerun of Father's Day from Series 1 and covers much of the same ground, which gave this episode a score of 9 rather than 10. The Doctor is almost a peripheral figure for most of the episode, but David Tennant makes the most of every line, look and gesture. The villain, Lumic, was a muted character compared to Davros but quite effective. When the Cybermen arrived, their previous risible portrayals in Doctor Who were completely removed from the memory. These are Borg like monsters. This, in effect, returns the favour as the Borg were originally based on the Cybermen, as their first appearance in the episode entitled 'Q Who' makes clear! They even have their own catchphrase to rival the Daleks' 'exterminate!!'. The new Who goes from strength to strength.