Herbert Tsangtse Kwouk, (Kwouk; ; Chinese: 郭弼; 18 July 1930 – 24 May 2016) was a British actor. He is perhaps best known for his role as Cato in the Pink Panther films. He made appearances in many television programmes, including a portrayal of Imperial Japanese Army Major Yamauchi in the British drama series Tenko and as Entwistle in Last of the Summer Wine. ()