The Trip of a Lifetime (TV story)

The Trip of a Lifetime was a narrative trailer advertising the first series of revived Doctor Who. It featured Christopher Eccleston in character as the Ninth Doctor, with Billie Piper also briefly appearing in a new shot as Rose Tyler, though she had no lines.

Summary
The Doctor asks you if you want to come with him in the TARDIS, warning you that it won't be safe, or easy, or restful — but stressing that if there's one thing that it will be, it is "the trip of a lifetime".