Like a stale marriage, after about half an hour you might feel like retaking your vows with this one, because although it starts well enough, the fire soon dies down. The two leads are great, sparking off each other and generally giving all they've got to these two-dimensional characters. But there's only so many one-liners you can take before you realise that there isn't actually anything happening. It's an interesting idea, and worth a look, but with the credentials of those involved you'd expect to get more for your money.