Chartreuse (liqueur) was not a secret but well known. At the death of the pharmacist, his heirs returned the manuscript to the monks who had been back at the Monastery since 1816. In 1838, they developed Yellow Chartreuse, a sweeter version of the Green Chartreuse, 40% alcohol liqueur (80° proof). The monks were again expelled from the monastery following a French law in 1903, and their real property, including the distillery, was confiscated by the government. The monks took their secret recipe to their refuge in Tarragona, Catalonia, and began producing their liqueurs with the same label, but with an additional label
But What a Sweet Little Room in the series, "But What a Sweet Little Room" was actually the second episode to be shot, filmed in June–July 1968. But What a Sweet Little Room Jeff investigates the disappearance of a wealthy young woman's aunt. When she too is killed he is led to the regular meetings of a medium, Madame Hanska, and uses Jeannie as a decoy to foil a thieving operation in which a gang of three middle-class men murder and rob rich middle-aged widows by taking them on an apparently innocent excursion to a cottage in the county. In this episode Marty contacts a phoney