Overseas CONTROL agent who Maxwell Smart is due to meet at the National Museum in Cairo in order to pass on a secret microfilm. An eight-year veteran, she is divorced from Harley Mason of the CIA.

Unbeknownst to Max, the "Mason" he meets is actually a KAOS impostor - a man with a beard and mustache. He duly reports the handover to the Chief who is understandably alarmed at Max's description of his contact, since Stella Mason never wears disguises. Max says he understands why her marriage broke up.

[Mentioned, Episode #126: "Moonlighting Becomes You".]