"The Uninvited" is the fifth episode of the first series of Thunderbirds, a British 1960s Supermarionation television series co-created by Gerry and Sylvia Anderson. Written by Alan Fennell and directed by Desmond Saunders, it was first broadcast on ATV Midlands on 2 December 1965. In "The Uninvited", Thunderbird 1 crashes in the Sahara Desert after being shot down by three unidentified aircraft. Two archaeologists rescue Scott, but one good turn deserves another, and later on, Scott finds himself rushing back to the desert when the pair become entombed in the lost pyramid of Khamandides.