This takes place "in the 1920s". According to Doc Bolton, Jeff Myrtlebank died from Influenza. The 1918-20 "Spanish Flu" outbreak of Influenza killed 50-100 million people worldwide (3%-5% of the world's population). Throughout the 1920s, outbreaks of Influenza continued to kill thousands of people across America each year, so a death from Influenza would be something both feared and not unusual.
A mailbox by the side of street reads "M. Pittman", for the director and writer of the episode Montgomery Pittman.
Sherry Jackson, who plays Comfort, was the stepdaughter of the episode's director Montgomery Pittman. Pittman had previously directed Two (1961) and had wanted Jackson to play the female soldier. She was deemed to be too young for the role and it went to Elizabeth Montgomery instead.
James Houghton, who was credited as "Jim Houghton" and played the character Jerry, was the son of the series' producer, Buck Houghton.
The song the organist played was "Abide With me," a nineteenth century hymn composed by Henry Francis Lyte commonly used in Protestant Christian funerals.