In the blink of an eye you can move from real-world historical figures to alien worlds in the distant future. Every genre imaginable — horror, comedy, romance, satire — can be part of the equation and still fundamentally be "Doctor Who". Six decades (and counting) of canon also means there's plenty of lore to fall back on.

The Doctor and Belinda are on an epic quest to return to Earth. However, a mysterious force is preventing their return.

Doctor Who's Cyberman episodes often have several recognizable hallmarks, and "The Robot Revolution" boasts a suspicious number of them.