Changes

[[Azazel]] was able to move freely between Hell and Earth, and [[Alastair]] appeared to be able too, as well as [[Crowley]]. [[Castiel]], and other [[angels]] have been able to enter and return, though at a cost as entering Hell for angels can be very dangerous. In the rare instance that a human [[soul]] is able to escape from Hell, unless there is divine intervention, a damned soul cannot gain entry into [[Heaven]]. There have been only three known exceptions to the rule: [[Dean Winchester]], who was sent to Hell after his [[crossroads]] [[deal]] came up, but upon being killed by the [[hunter]] duo of [[Walt and Roy]], Dean was allowed entry into Heaven in order for the angel [[Joshua]] to pass along a message from [[God]] to the Winchesters. After [[Bobby Singer]] was killed by the [[Leviathan]] [[Dick Roman]], Crowley ensured through the use of the rogue [[reaper]] [[Ajay]], that Bobby would end up in Hell. Bobby was later rescued by [[Sam Winchester]] for the second [[trial]] to close to Gates of Hell, which required that "An innocent soul has to be rescued from Hell and delivered unto Heaven", which allowed Bobby entry into Heaven. For years it was unknown what became of [[John Winchester]] after his escape from Hell, after the second death of [[Mary Winchester]], [[Castiel]] confirmed that John was in Heaven with Mary, telling Sam and Dean that Mary was with "John, and there's no sorrow. There's no guilt. Just joy."

Castiel reported that [[angel]]s laid siege to Hell to rescue [[Dean Winchester]] before he broke the first seal, but did not reach him in time. Eventually, it was Castiel who pull Dean from Hell.