Archangels

Archangels are extremely powerful celestial beings that were created by God, and are imbued with emense power and authority. Their true forms or visages prove desturtive and overwhelming to mortals and prove fatal in some instances. Castiel pronounces them as being fierce and absolute, but not very just.

Known Archangels

 * Michael - In Lucifer's Cage
 * Raphael
 * Gabriel - Deceased
 * Lucifer - In Lucifer's Cage

"Tall Tales"
The Winchesters first encountered an Archangel back in Season 2 but never found out he was an Archangel until Season 5, They just believed it was a Trickster but it turned out to be Gabriel.

"Mystery Spot"
They Meet the same Trickster again in this episode where he plays a cruel joke on Sam by killing Dean over 100 times, but eventually they still never figure out he was an Angel/Archangel, they didn't even know they existed.

"The Monster at the End of This Book"
This episode marks the first actual contact with an Archangel, although not actually seen on screen only as a beam of light, this is the first time Sam and Dean find out about Raphael the Archangel.

"Lucifer Rising"
In this episode 2 Archangels are seen! The first is when Raphael destroys Castiel. The Second is when Lucifer is raising from the pit.

"Sympathy for the Devil"
In this episode the Archangel Lucifer finds his vessel.

"Free to Be You and Me"
This episode shows Raphael with his first physical human vessel, in which he gets caught within holy fire.

"The End"
In this episode Lucifer seems to have taken over Sam's body and is in control of the Earth and has gotten Sam to say Yes. (Alternative Future)

"Changing Channels"
This shows Dean and Sam the trickster was an Archangel all along after Sam and Dean realise the only time people get annoyed so bad is when they're talking about there own family which gives the Archangel Gabriel's disguise as the Trickster away.

"Abandon All Hope..."
Lucifer is the Archangel in this episode, and he is in Missouri getting ready for a ritual to bring back Death.

"The Song Remains the Same"
This episode marks the first time the Archangel Michael has a human vessel, he got John to say yes as he would save Mary's life.

"Point of No Return"
Michael appears in this episode but only as a beam of white light with Adam in the room with him suggesting he possessed Adam in this episode.

"Hammer of the Gods"
Gabriel resurfaces along with Lucifer, this shows the first Archangel Blade, which is used when the two brothers fight, and Lucifer ends up

killing Gabriel.

"Swan Song"
Michael and Lucifer fight in this episode with Sam as Lucifer's vessel and Adam as Michaels, but Castiel uses some sort of holy fire molotov to send Michael away temporarily, Lucifer obliterates Castiel, and then kills Bobby, then intends on killing Dean, but Sam takes control of his body and opens Lucifer's Cage and pulls his self and Michael into it then it is locked, after this Castiel returns saying God brought him back, and is now believed to be an Archangel.

"The Third Man"
Raphael beat Castiel and just as he was about to kill him(using what possibly could be Raphael's Archangel Blade or an Angel Blade) Balthazar came and destroyed his vessel using Lot's Salt. Raphael now has to find a new vessel.