Picture the scene; an alien world, trees that bear no resemblance to those found on earth, grass that’s the wrong colour, orange, or pink, or turquoise. Maybe there’s more than one sun in the sky, or twin moons visible by day.
There might be a crystal city in the distance, or herds of peculiar ten-legged creatures gazing on the plains as strange scents fill the air.
Then a powerful wind gusts out of nowhere, a grinding sound stampedes the creatures, a blue box materialises, and people step out. For the Doctor and his companion, another adventure is about to begin.