Watch the Rebels with a Cause documentary on iwonder. A look at the life of major TV writer-producer Sam Simon as he fought 2 battles – one against cancer and another for animal rights. Best known for co-creating The Simpsons, Simon was diagnosed with terminal colorectal cancer in 2012, and given 3 to 6 months to live. He defied that prognosis and lived until 2015. As he battled the disease, Simon chose to donate most of his fortune to save animals from harmful and abusive situations worldwide.