Him Law
In early 2021, it was announced that filming would be delayed due to the COVID-19 pandemic. Wayne Lai confirmed that both Tang and screenwriter Cheung Wah Biu will be returning. News of Mayanne Mak joining the cast was reported in April 2021 but she clarified stating that while she hopes to join the series, it is still in early development and only Lai and Tang have been confirmed. In the same report, it was said Susan Tse and Pierre Ngo would make a possible return to the franchise. In late April 2021, it was reported that Rebecca Zhu and Him Law have joined the cast with production set to start in August 2021.