Two clips are online, both from Space Babies. One is the Dinosaur one showing Amy what the TARDIS can do, demonstrating it not only moves in time (naturally) but also in space (As they're in prehistoric America).

Another is them looking out into space and the Doctor going ("I've got no home, species etc. but I do have freedom")

Both seem like a sort of higher budget, more optimistic version of "End of the World", except with the Doctor actually letting the companion check outside that they're travelling in time, and a demonstration of "space" (Rose already knew the TARDIS could dematerialize and rematerialize in well, "Rose") and the Rose/Doctor looking out into space thing but with dialogue similar to the "chips" scene. (Or alternatively a similar scene in "Beast Below").