I knew Grace was going to have to die, otherwise why wasn't she travelling with them? Made no sense that Bradley Walsh would be travelling with the Doctor and just leave his wife behind. Although, then they did the thing with him getting dragged along by accident, but it would have been awkward to say the least if they didn't go straight back and get her, or drop him off. Even if they go with "Oooh, the TARDIS is lost" or "The TARDIS (which we have now found) isn't going where we want it to". (I hope the TARDIS shows up soon. They're claiming they won't do series arcs, so having it missing for most of the series would be...what then?)