Next Time on Doctor Who...

The Doctor turns to Rose. "I think it's time I give you a little perspective on aliens. We're going to the planet Sirius!"

It's daylight across a bright white sky reflecting on the golden grass. Flowers are prevalent in purples and blues which match the large mountains far away. It's almost like a royal color scheme.

"Tucked away in its own little corner of the universe Sirius teams with life, but it's not discovered by humans until millions of years into the future. So, for the first time in your life, Rose Tyler, you'll be the alien."

The Doctor and Rose stand on a cliff overlooking a great city. It bustles with action as it's light blue inhabitants go from activity to activity.

Rose turns toward the Doctor and grins. "Well, Doctor, are you ready to run?" They tear through the streets of the city, laughing.

Rose lays relaxed on a table next to the one the Doctor is lying on. "Doctor, I've always wondered what it was you were going to say all those years back on that beach."

Several TVs turn on with the words "Special Broadcast" displayed. The screen is filled with a very grainy image of a human figure in all of its color, but is so distorted that facial features are unrecognizable. The figure announces, "People of the great civilization of Sirius I represent the mighty Human civilization. You have a human traitor amongst you who just landed on your planet with ill intent. And her name is Rose…"

The Doctor tells Rose sternly, "We need to get to the TARDIS, quick!"

They are thrown into a dark room, and a guard slams the door on them.

The Doctor jumps over a fence running, and Rose does the same.

A blue armed guard happily mutters into a com with Rose cornered against the wall. "I got the alien right here, and I'm not letting it out of my sight."

Rose holds up her hands in the air and yells, "Doctor!"

Series 4 will continue with "Sirius" next week!