Mary Palmer on The Alienist had thirty minutes total of screentime (actually, less than that - the supercut I made included other characters talking about her, so that inflated the runtime) and was unceremoniously fridged in episode eight. But she was so interesting! She was an incest survivor who'd killed her father and managed to get out of prison because a psychiatrist finally turned up and convinced the authorities she'd been acting in self-defense. So she lives with the guy as a maid, and he's consulting on murder cases and YOU WOULD THINK that this would lead naturally into her being more involved with the main plot - it's not like she doesn't have relevant experience! But no, she's just there to be a love interest and then get killed off. I'll die mad about it.