Geez. Most people clearly have no clue what people on the autism spectrum are like. Sonia cross has what is formerly known as aspergers-now it's reclassified as a form of ASD-autism spectrum disorder. As someone who deals with this, I can say that Diane's performance is SPOT on. The first episode may have been a little shaky-but after that it's all good. I also want to point out that further in the series you do see her character get emotional-and I've seen people complain about that, because they claim it's "innacurate". It's not. People on the spectrum are prone to meltdowns and sometimes innapropriate emotional reactions. This can easily happen when it's something that's emotionally connected to them. Diane does a great job with this role.