Factual error: Towards the end of the episode, Mason reads a report on Daisy's death indicating she died 13 December 1938 in Marietta Georgia of smoke inhalation. It apparently was common knowledge that Daisy died on the set of Gone with the Wind (supported in the Halloween episode by someone who knew her when she was alive). The filming of the big fire scene in GWTW was 10 December 1938 so the dates are pretty close. But these early parts of the production of GWTW (and I believe the rest of the movie as well) were filmed in Culver City, CA, not Marietta. (00:34:50)
Other mistake: In the copy room, George, after she speaks with Daisy in voice over, says "its 3am", but the clock on the wall behind Crystal shows 12:35 when George talks to Crystal.
Continuity mistake: When the reapers are inputting the data, they are only typing in the final thought. However, in every shot of the spreadsheets, there are entries for final thought, name, date, and location.
Chosen answer: The Song is Callled "Boom Boom Ba" and is by the band Metisse. it plays at certain points during the series. Mainly when George is looking over Reggie or in Reaping Havoc where it plays whilst shes showing her scrapbook "Mysterious and Reassuring" which is what she thought Betty was.