I usually find that HBO does a good job with its films and once more they have. I enjoyed the film, but was left wanting more. I wondered more about her mother's relationship with her "special auntie" and also more about how her career started and the people in her life. Two hours is a short time to cover all that so overall I'd say they did a decent job. As a cable film it's worth a watch, but I wouldn't pay to see this at the theater. If you really want a good bio try something on A & E, they usually give you more background.
Review of Introducing Dorothy Dandridge
