The best Neil Patrick Harris movies and TV shows include a wide range of roles, from a kid doctor to a womanizer to a fictional, over-the-top version of himself. Harris got his start as a child actor and made a name for himself as the lead in the television show Doogie Howser, M.D., where he played the titular character at the age of 16. Harris's career as an adult was a fascinating journey, with him finding great success on the Broadway stage and later on television.