The Case - The context and setting, as well as supporting characters
The Old (Wo)Man - If Mrs. Columbo acts the way she 'should' based on how she's described by Mr.Columbo
The Look - How it's cut and edited, how the episode paces, and how it feels as a separate singular piece of media
The Unravel - How Columbo actually gets from A (she knows who killed them) to B (the reveal at the end of the murder)
The Murder - The premise and setup as well as the execution of the murder
The Bad Guy - How great the villain and how great their interactions are
The Overview - Just how we feel about the episode as a whole