Episode Title: Gridlock

Duration: 44 minutes and 58 seconds

Written by: Russell T Davies

Directed by: Richard Clark

Transmission Date: 14th April 2007

Ratings: 8.4 million

Synopsis: The Doctor takes Martha to the planet New Earth, in the far future, as the third series of Russell T Davies' Doctor Who continues. But when they find the streets being ruled by the sinister Pharmacists, they must brave the ordeal of the mysterious Motorway in order to discover the terrible secret at the heart of the city.

Cast List: The Doctor — David Tennant
Martha Jones — Freema Agyeman
Thomas Kincade Brannigan — Ardal O'Hanlon
Novice Hame — Anna Hope
Milo — Travis Oliver
Cheen — Lenora Crichlow
Valerie — Jennifer Hennessy
Alice Cassini — Bridget Turner
May Cassini — Georgine Anderson
Whitey — Simon Pearsall
Javit — Daisy Lewis
Businessman — Nicholas Bolton
Sally Calypso — Erika Macleod
Ma — Judy Norman
Pa — Graham Padden
Pale Woman — Lucy Davenport
Pharmacist #1 — Tom Edden
Pharmacist #2 — Natasha Williams
Pharmacist #3 — Gayle Telfer Stevens
The Face of Boe — Struan Rodger