As Lieutenant Harrington, being stationed on MoonBase, has no occasions to travel to Earth in the course of the programme, little is known about her beyond her being one of Gay Ellis's and Nina Barry's fellow lieutenants in S.H.A.D.O. and one of their colleagues on MoonBase.
The actress behind the roleEdit
Antonia Ellis acted out Joan Harrington in UFO: The Series. She was never shown without her purple wig or out of her silver uniform, so photographs of Antonia Ellis from the early 1970s, the time when the programme was produced, which show her undisguised are difficult to locate.