This Dr Who Easter special from 2009 tantalisingly dangles a potential new companion before the viewer in the shape of feisty cat burglar Michelle Ryan's titled bored rich girl character only for the Doc to turn up his nose and continue to fly solo. Beforehand, they share a moderately exciting adventure when after daringly stealing a closely-guarded golden artifact Mission Impossible-style, they find themselves sat together on a red London bus just about to take a trans-dimensional trip to anther world, naturally, where they encounter another world-threatening species, ditto naturally, before saving said world yet again in the nick of time - naturally to the power 3!
Borrowing some ideas from Harry Potter (a flying bus, the Doctor's "parseltongue" type dialogue with the Dead Planet's initial batch of aliens) the story's okay if lacking somewhat in excitement or surprises. There's the odd smattering of humour and a nice frisson between Tennant and Ryanm but Lee Evans as a Doctor-adoring UNIT boffin gets too much screen-time.
With no single antagonist to act as a focal point, the story struggles to really create tension and thrills and by the end relies far too much on CaGen SFX as the flying menace targets earth for occupation in their millions.
Seasonal specials and Dr Who tend to go hand in hand, but this episode failed to really take for me.