When CONTROL learns that the deadly assassin known as The Exterminator has been sent to eliminate him before he can testify, Dietrich is taken into hiding, transported by fire engine to Maxwell Smart and 99's apartment where he is forced to disguise himself as Mrs. Feldman, the woman employed to help take care of the Smarts' twin babies. Portrayed by Fabian Dean [Episode #131: "Witness for the Execution"].