==Entry & Escape from Hell==
[[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.
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.