I've been watching old Law & Order SVU episodes. There is a "TIM", who murders his/hers boyfriend's brother to prevent being outed", in season 4, episode 23 (called Fallacy).
I think the episode is from 2002.
The TIM is played by a female actress called Kate Moennig.
There is open discussion among the characters about the person being a man, and his/her lawyer makes a comment that "gender is beyond the binary".
I was surprised to see any mention of "the binary" from that time. Was this one of the earliest examples of this seeping into popular culture, or am I wrong about that? When exactly did gender ideology begin gaining traction in the mainstream, and does anyone know where mentions of "the gender binary" originally came from?