A bottle story!
I liked a lot of this episode, but it felt like there was too little material for it. The repeating alien went on just a bit too long each time something new happened, and I began to feel like someone was scraping their nails across my brain, and also bored. Which might be what the trapped characters felt, but I prefer a little more distance than that.
Another flash of Rose on the screen.
My favorite part was the passengers being forced to endure three types of "entertainment" at once, and then the Doctor discreetly shutting them all off. A fantasy fulfilled!