The BBC continues its successful quest to rebrand the iconic DOCTOR WHO franchise with this fourth series of 21st-century episodes. David Tennant continues as the 10th incarnation of the Doctor, with Catherine Tate (who first appeared in the 2006 Christmas special) joining him as his faithful companion, Donna Noble. Together, the time-travelers traipse through Pompeii the day before its eruption; investigate mysteries with Agatha Christie; and even meet up with the Doc's previous roadie, Rose Tyler (Billie Piper). Also included here is the 2007 Christmas Special, featuring singer Kylie Minogue as a waitress aboard the Titanic.