I am currently watching an online documentary on viruses causing cancer, and particulary a virus from mice. Hmm interesting. This is well made, this is an Australian doc presented by a canadian broadcast and worth watching if only to understand a bit of the biology of viruses and cancer.
http://www.cbc.ca/video/#/Shows/The_Passionate_Eye/ID=1340810172
http://www.cbc.ca/video/#/Shows/The_Passionate_Eye/ID=1340810172