Images 17: Septomis Prime!

[Norgarth]

Uhm....

I thought it was supposed to be self-explanatory: that the only feasible reason for the much decayed remains of the Statue of Liberty to be there was because rather than going to another planet, they had instead gone to another time in the distant future.  (And we can't say that no one would get it because it hasn't been done before, either.  We'd been seeing these kinds of plot twists in Dr. Who for decades already.)

That's the joke,