Geography Documentaries of the Week: Check these out as a relaxed way to aid revision:

Megacities: http://www.youtube.com/watch?v=ag-74cPcSjM
The year the earth went wild: http://www.channel4.com/programmes/the-year-the-earth-went-wild/4od
Flooding: http://www.channel4.com/programmes/the-year-britain-flooded/4od
Weather: http://www.channel4.com/programmes/is-our-weather-getting-worse/4od
Weather: http://www.channel4.com/programmes/the-year-britain-froze/4od
Weather: http://www.channel4.com/programmes/the-worlds-weirdest-weather/4od
Hazards (not part of GCSE Syllabus but still a great watch for any keen geographer): http://www.channel4.com/programmes/japans-tsunami-how-it-happened/4od
http://www.channel4.com/programmes/japans-tsunami-caught-on-camera/4od
BBC Coast: http://www.bbc.co.uk/iplayer/episode/b00tfn9l/Coast_Series_5_Gower_to_Anglesey/
Ecosystems:http://www.bbc.co.uk/iplayer/episode/b01qchb0/Natures_Microworlds_Great_Barrier_Reef/
Enjoy :)