The penultimate episode of this season of Diabolical is a middling effort both in terms of technical and storyline, but it is elevated a little by its sweet allegorical central idea.
Desperate to save his wife, who is dying from inoperable cancer, John (Randall Duk Kim) steals a syringe of compound V from the Vought building, where he works as a janitor. He gives her the injection just as Vought's security arrive. They decide to kill the elderly couple and make it look like a natural death, but giant tentacles come from Sun-Hee's (Youn Yuh-Jung) body and kill the agents instead. They escape to the forest, where Sun-Hee's cancer leaves her body and begins to destroy the surrounding area and a few more Vought agents in their trail. John wants to leave the cancer to it, but Sun-Hee knows that it's her responsibility to defeat this threat.
Written by Andy Samberg, the fighting of an external giant cancer cell is a fairly explicit simile for a person's internal battle against cancer, one in which others may support you, but ultimately you do alone. The central performances are sweet, but I didn't notice either Khary Payton or Samberg himself whilst watching it. The animation style is something approaching a Studio Ghibli style, though for clarity's sake I should say that it's not actually them.
As I say, it's a fine, competent piece of work but perhaps lacking that real memorable moment to make it more worthwhile.