Though much has (unfortunately) changed in NYC, the opening establishing shot (60th at between 3rd/2nd aves) features Serendipity 3 (partially obscured begins the tree on the left) is still there - doing very well - almost 50 years after this episode was shot. He was also the son of Yvonne DeCarlo
Thirteen year old Michael Morgan appeared in this september 1972 episode as Charley. He died at the age of 39 on february 15, 1999.