The fuzzy image of Earth, the first photo of the planet taken by a satellite, was transmitted by Explorer 6 in August 1959.
Alma Cogan was an English singer popular in the 1950s and early 1960s, known as 'The Girl with the Giggle in Her Voice'. Her hit records include 'Why Do Fools Fall in Love', 'Sugartime', and 'Bell Bottom Blues'. She was one of the earliest UK recording artists to make frequent appearances on TV.
Advocaat is a Dutch alcoholic drink, somewhat like eggnog, made from eggs, sugar, brandy, and sometimes cream or milk.
Alma Cogan was "the girl with the giggle in her voice" who sang, "Never Dance a Tango With an Eskimo", from the previous episode. (The song did NOT go over well with Inuit or other "Eskimos" at the time).