Watch Rethinking Cancer (2009) : Full Movie Online Free Rethinking Cancer is an educational documentary film that provides a rare look into the psychological and therapeutic journeys of five men and women who used biological alternative cancer therapies to overcome serious illness. Their stories represent successes that mainstream medicine and the public ought to know about. Four of the featured subjects had been diagnosed with cancer; two of these patients were considered terminal cases. The fifth patient had a severe case of Lyme disease. All five have outlived their diseases, between 15 and nearly 40 years, thus far.