The following episode , " 42 " , was delayed by one week to make way for the BBC 's broadcasting of the Eurovision Song Contest . The BBC Doctor Who web page announced in advance that ' something special ' would be appended to the end of the original broadcast of this episode . This proved to be an extended teaser for the remaining episodes of the series , taking the place of the usual " Next time ... " teaser trail and headed instead " Coming up ... " . This was also made available immediately after transmission on the BBC 's '' Doctor Who '' website . The extended trailer featured many short clips from upcoming stories : eyeless animated scarecrows and the titular Family of Blood , the return of Captain Jack Harkness , Sir Derek Jacobi in character , Michelle Collins likewise and , briefly , John Simm as the mysterious Mr. Saxon seen smiling for press cameras before the Houses of Parliament and in the Cabinet Room at No. 10 wearing an oxygen mask , sinisterly tapping out the heavy rhythm of the incidental music and surrounded by inert bodies . At the very end , a further caption ahead of the credits of " The Lazarus Experiment " revealed that " '' Doctor Who '' will return in two weeks " . The " normal " trailer for " 42 " was then made available on the BBC '' Doctor Who '' website and was used on the DVDs instead of the special trailer , and is used in most repeats of the episode
Eurovision Song Contest
Eurovision Song Contest 2007
The Lazarus Experiment