Detective Saga Noren in The Bridge was fairly clearly high-functioning autistic, having Asperger Syndrome or being somewhere nearby on the autistic spectrum.
This portrayal was, I felt, broadly positive. Saga is an intelligent woman, capable in her field of work, with focus and a useful detachment.
Her personal and emotional life was atypical, but not in a particularly negative way. Her autistic-literal thinking was shown in amusing ways too: on one occasion in a nightclub, a man she fancied offered her a drink and walked away bemused when she refused; she followed him to explain that she