Through the early 2000s, Kao may have been best known for his role as [[Archie Johnson]] in the hit [[television series]] ''[[CSI: Crime Scene Investigation]]'', as well as the role of [[Kai Chen]], the Blue Ranger, in ''[[Power Rangers Lost Galaxy]]''.
Kao shares his birthday with fellow ''[[Power Rangers]]'' actress [[Thuy Trang]] (1973-2001), who played the original Yellow Ranger, [[Trini Kwan]], in ''[[Mighty Morphin Power Rangers]]'' from 1993 to 1994.