Doctor Who's 'Midnight' terror
The first thing to note about this episode is that it's very Donna-lite. Production-wise, this ties in with next week's episode, which is veeery Doctor-lite. But more about that next week.
So, the Doctor goes on his mystery tour while Donna lounges by the pool, but before reaching its destination the ship suddenly breaks down. No-one is allowed to venture - or even look - outside because of the lethal extonic rays. A rescue ship is promptly deployed, so everything is fine. Right?
Oh, one other thing...
Don't blink - or you might miss it.