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During a tearful confession, Colleen admits her greatest fear is not only dying, but letting go of her only source of comfort: food.
Click here to watch Part 1: Dr. Oz begins his intervention with a house call.
Click here to watch Part 3: Colleens husband and mother join the show.
Click here to watch Part 4: After refusing medical tests for 15 years, Colleen begins treatment.
Click here to watch Part 5: Dr. Oz explains Colleens shocking test results
Click here to watch Part 6: Colleen's mentor, Ruby, promises to help her lose the weight.