Legal Question in Technology Law in California

Depending on the substantial similar of your game to the show, you will need to obtain a license from the owners of the show's intellectual property rights.

Feel free to contact our firm or an intellectual property attorney in your area to discuss the elements of your game and to assist in obtaining a license if necessary.

Best,

Jim

If you want to use an existing character, you will need a license from whoever owns the rights to that character. The owner is probably (but not necessarily) the same person or entity which owns the overall rights to Dr. Who. They may be willing to give you a license if you can agree on a price, but you should expect them to demand some control over your work and your product.