What television show do you think has a subtle (yet profound) positive effect on undermining negative stereotypes?

My vote goes to “Dr. Who” and “Torchwood.” Both have characters that relate to each other almost without recognition of race or gender or sexual orientation – or more accurately, do so as if such characteristics were not all that important. Interracial relationships and bisexuality are treated in a dignified manner – basically, they aren’t pointed out as being different in any way.

Any others – and why?