The Doctor takes Martha to New Earth, only to find that the city has become a deadly trap. 2009-11-27T17:25:40Z tag:feeds.bbc.co.uk,2008:/iplayer/feed/episode/b0074gnr BBC http://www.bbc.co.uk tag:feeds.bbc.co.uk,2008:PIPS:b0074gnr 2009-02-19T00:39:46Z

The Doctor takes Martha to New Earth, only to find that the city has become a deadly trap.

<p> <a href="http://www.bbc.co.uk/iplayer/episode/b0074gnr/Doctor_Who_Series_3_Gridlock/"> <img src="http://node1.bbcimg.co.uk/iplayer/images/episode/b0074gnr_150_84.jpg" alt="Doctor Who: Series 3: Gridlock" /> </a> </p> <p> The Doctor takes Martha to New Earth, in the far future, only to find that an entire city has become a deadly trap. </p>