September 2003: Doctor Who to return to BBC1
March 2005: Christopher Eccleston is resigning as the Doctor after just one series
October 2005: Doctor Who spin-off series Torchwood will see the return of Captain Jack Harkness
October 2006: First series of Torchwood broadcast
July 2007: Catherine Tate announced as new companion for fourth series
July 2008: Series 4 finale, Journey's End, is the UK's most watched programme of the week