At the scene of the burned office fire hoses of a rather modern type are rolled out as they have been used to extinguish the fire. But they are completely flat, that is they do not contain water. Such flatness can only be seen after the water has been pressed out as the hoses are rolled up. They have thus not been used.
The advert for the Taj Mahal restaurant on the cinema screen shows a 6 digit phone number but at this time it should have been a 5 digit number.
The name of the Italian cafe owner's daughter is clearly pronounced as 'Julia', which in Italian would be written 'Giulia'. There is no 'J' in the Italian alphabet, and the English 'J' sound is made by the letters 'Gi'. But in a document Morse looks at, it is written 'Guilia', which in Italian would be pronounced 'Gweelia'. That spelling also appears in the titles.
The actor lying on his bed as the recently deceased Mr. Beavis is visibly breathing in one full-frame shot of his head and torso at eight minutes.
This episode is set in 1968. When we first see Giulia Gallo in Brown's Cafe, she is reading a May issue of "Movies Monthly", a fictional magazine. On the back cover, we see an advertisement for lipstick featuring Lucille Ball, who is described as "Co-starring in Lured (1947)". Lured (1947) was released in 1947, 21 years before the events depicted in the episode.
Emil Valdemar points out that the autograph in the autograph book is accompanied by the cartouche of the pharaoh Akhenaten. However the cartouche shown is not that of Akhenaten, which is easy to recognize at it contains a circle representing the sun disc (the god Aten from which he took his name).