Charles Macaulay played two authority figures in The Original Series: the projected image of Landru in The Return of the Archons and Prefect Jaris of Argelius II in Wolf in the Fold.
Charles Macaulay (1927–1999) was an American stage and television actor with a commanding voice that suited both of his Star Trek roles.
In The Return of the Archons he is Landru, or rather the robed image that the ancient computer projects of its long-dead creator. He appears to Kirk's party in their cell and announces that they will be absorbed into the Body for the good of all.
In Wolf in the Fold he plays Jaris, the prefect of Argelius II, who presides over the inquiry into the murders of which Scott is accused. His wife Sybo is killed during the seance held in their home, and Jaris himself is briefly possessed by the entity Redjac aboard the Enterprise.