Dayo Mei (Eugenia Yuan), arrives in Hawaii to deal with some unfinished business. After arriving at the airport undisguised, she changes taxis and arrives at her apartment disguised as an unassuming elderly lady. Once there she removes her disguise.
Leaving a trail of bodies in her wake she leaves, but not before leaving a message that Wo Fat’s widow can't wait to meet Steve McGarrett
Jeff Dawn was the makeup department head.
I don’t know who was resposible for the prosthetic makeup but Clinton Wayne has worked on a number of episodes.