Introduction - Episode Seven: The Long Game

In the far future, Adam Mitchell discovers that life as a Time Lord's companion isn't as easy as it looks in Russell T Davies' adventure through time and space.

In episode seven of Doctor Who - The Long Game, on BBC ONE on Saturday 7 May - Adam discovers the wonders of travelling in the TARDIS.

In the far future, Satellite Five broadcasts to the entire Earth Empire. But anyone promoted to Floor 500 is never seen again, and the Doctor suspects mankind is being manipulated.

Nothing escapes the eye of the sinister Editor - but just who is he working for?

And does Adam have what it takes to become the Time Lord's companion?

The Doctor is Christopher Eccleston and Billie Piper is Rose.

Guest stars include Bruno Langley as Adam, Simon Pegg as The Editor and Green Wing star Tamsin Grieg as the Nurse.