《木棘证人（粤语版）》是由张世昌执导，罗仲谦,韦家雄,张曦雯,徐荣,张文慈,刘江,张秀文,黄子雄,秦启维,汤俊明,方绍聪,司徒晖,卢峻峯,袁洁仪,赵乐贤,曾海昌,徐玟晴,吴珮如,尹诗沛,罗鸿,张诗欣主演的港台剧。该电视剧于2020年在香港上映。TVB新剧《木棘证人》举行造型发布会，担任男主角的罗仲谦这次饰演一名警察：“我以前饰演警察都是比较勇敢，今次就贴地些。”时隔三年回巢拍剧，罗仲谦说其实这三年一直都有讨论档期的问题：“刚有这个档期，我听到演员班底就好想合作，因为我未同韦家雄合作过，我好欣赏她，张秀文、文慈、Kelly（张曦雯）我都是第一次合作，觉得自己应该好好把握这个机会。《木棘证人》将会在本月中开机拍摄，最少也历时三个月，罗仲谦认为在香港拍戏有一大好处：“在这三个月就可以陪下老婆（杨怡），老婆又可以陪我开工。（接下来会多在香港拍剧？）我当然是想，但下一转要再倾一倾（档期）。”问到在香港与内地拍剧有什么不同，罗仲谦说自己在TVB拍戏若干年，所以有多些朋友，在工作上有多些乐趣。
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