Liverpool Sound and Vision Rating * * * *

Cast: Billie Piper, Camille Coduri, Mark Benton, Nicola Blackman, Robert Cavanah, Luke R. Francis, Indigo Griffiths, Victoria Jeffrey, Malcolm Jeffries, Hywel Morgan, Sarah Priddy, John Rayment.

Tread softly in the worlds of others, for your presence has not been anticipated enough for it not to leave a groove in the sands of their time.

Rose Tyler has had to learn this the hard way, initially with her travels with the Doctor, then as she is stranded in another version of Earth, a parallel world where the fabric of time has altered certain aspects of what she, and the listener, would take for granted.