The Doctor takes Martha to New Earth, in the far future, only to find that an entire city has become a deadly trap.
| Title | Gridlock |
|---|---|
| Genres | Action & Adventure Drama Sci-Fi & Fantasy |
| Release Date | 2007-04-14 |
| Episode Runtime | 00 Hours 25 Minutes |
| Season Number | 3 |
| Episode Number | 3 |
| Production Companies | BBC Cymru Wales, BBC Studios, CBC |
