Visible crew/equipment: When Roger's holding the twins over the railing, Cindy grabs Maura, but Roger drops Vivian, and just as he lets the little girl fall we can see both hands of a crew member at the bottom of the screen.
Factual error: They show the side of a 1965 Philadelphia Police car. The gold shield on the door was not used until 1968.
Factual error: They show a 1965 flashback of a blue Philadelphia Police car. The Philadelphia police didn't go to the blue cars until 1973 when Mayor Frank Rizzo saw that New York went to the blue cars and liked the color. Before that the cars were red.
Chosen answer: According to IMDb.com, it is Carly Simon.
Michael Albert