Changes

In [[2.16 Roadkill]] Sam tells [[Molly McNamara]] how [[John]] believed burning bones was like death for [[ghosts]], but admitted he wasn't sure what happened. Similarly [[7.19 Of Grave Importance]], [[Bobby]] and [[Annie Hawkins]] believed that once a ghost's bones are burned, they are just "gone." This Sam even suggests this end for ghosts when he tells Ajay it was "end of story" for Bobby because they burned his bones. However, this episode reveals that when a ghost's bones (or object tethering them) are burned, the spirit is taken to their destined afterlife. In the case of Bobby, he was diverted to [[Hell ]] rather than [[Heaven ]] due to Crowley's machinations.

This episode continues the long tradition in which [[Dean]] fails to get to eat his [[pie]].

Upon entering [[Hell]], Sam uses his watch as a marker to find the entrance again. Sam removing his watch could also be seen as a reference to time having no meaning in Hell.

Sam spends at least two days in [[Purgatory]] and Hell; it takes Sam 7 hours to and 7 hours from the back door into Hell from the spot he arrived in at Purgatory, as [[Ajay]] tells [[Crowley]] he will be retrieving Sam in 17 hours when Sam arrives at the entrance to Hell. It is not known how long Sam actually spends in Hell looking for Bobby, but if we are to use the "real time" in the episode, he is in Hell for around 5 minutes, which would be around 10 hours in Hell time. It then takes Sam, Bobby, and [[Benny]] at least 24 more hours to reach the exit in Purgatory (in the script Sam makes mention to Benny that the three had been traveling for a day and a half), as it would still take [[Dean]] 20+ hours to make the drive from Kansas City to the 100-mile Wilderness even if he was speeding the entire way.