I found S2E12 very intriguing.
It features a heavy, lengthy confrontation between the couple played by Park Joo-Mi and her psychologist husband, Lee Tae-gon after his affair was exposed.
The wife, Park Joo-Mi, displayed a perfectionist character blaming her mother for her childhood's unhappiness, and now her husband for betraying her.
It is my opinion that this TV show has gone beyond its entertainment purpose through this episode when this couple bare their souls dealing with their inner pain.