4x16 - On The Head Of A Pin

Castiel also possesses the ability to bend time and teleport himself and another backwards through time. Perhaps Castiel's most impressive ability observed to data was his removal of Dean's soul from Hell and the apparent resurrection of Dean that followed. Apparently, Castiel is not only capable of entering and exiting Hell at will and without harm, but also of extracting a particular soul in the process. Castiel also appears to be capable of projecting at least a portion of his true self from his host, as at the end of "Lazarus Rising", he was able to display the shadows of his wings to Dean...

Cas was sitting in one of the hearing rooms at the police station. There some pictures laying across the table.
“Do te recognize any of these people, Mr. Novak?” inspector Anderson asked. Cas glanced fleeting at the pictures.
“Nope, never saw any of those poor, poor dead people” he replied careless.
Inspector Anderson shoved a picture towards Cas. “You should take another look” Cas picked up the picture of Heather unwillingly. “According to your medical files te once had a serious overdose of heroin, which turned te extremely violent to yourself. te see those needles? Those...