The Pure and The Evil is about two teenage friends who meet later in life when the sexual tension between one friend and the other friend's husband reaches a high level.
| Actor | Role |
|---|---|
 Chan Pui-SaiRose Ling/Ling Mui-Kwai | Rose Ling/Ling Mui-Kwai |
| TTai Liang-ChunMay/Fong So-Mei | May/Fong So-Mei |
 Lau Siu-KwanChan Kar-Zhen | Chan Kar-Zhen |
 Tony Liu Tian-jueDr Clement Lau | Dr Clement Lau |
 Wong Chik-SamDr Sam Yuan | Dr Sam Yuan |
 Wai LitLi's boyfriend | Li's boyfriend |
 Pei Ju-HuaLee | Lee |
 Choh Seung-WanMrs Judy Lam | Mrs Judy Lam |