CONTROL Agent 18 is mentioned on three occasions. It is possible that the last two are the same person.
- Agent found dead - and toothless - after being assigned to carry microfilm hidden in a tooth [Episode #44: "The Whole Tooth and..."].
- Senior partner in the CONTROL law firm of 18, 26, 35, 44, 51, 33 and Sons [Episode #76: "The Little Black Book, Part 2"].
- Simpson. First choice of Maxwell Smart to be his best man but killed by KAOS after Max asks him [Episode #92: "The Worst Best Man"].