"That's your problem, you arrogant fools! You convinced yourselves that there is only one Prime. You've convinced yourselves there is only one method of travelling. Yet I exist, and that's direct proof of your mistaken assumptions!"
Earth, Hong Kong, 1998. The Sixth Doctor and Peri see a movie, have dinner, take a pleasant boat ride. Whilst all around the Earth is being invaded.
Strange mosquitos everywhere. A Chinese girl sees too much in the bedroom of a visiting businessman. Her boyfriend finds the key to all his gambling debts. And a duo of visitors from another world skulk in the shadows, awaiting a mysterious package.
Once again, the Doctor is on hand when the Earth is in deadly danger. And this time, even his unerring fashion sense and razor-sharp repartee may not be able to prevent the destruction of an entire planet.