Having escaped briefly from the archangel, Castiel appeared at St. Mary's to warn the Winchesters that an entire fleet of angels was coming for them. Castiel entered the room, his patented blank look on his face, and began, "Dean, I have something to tell… Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah!!!"
Sure enough, Castiel had walked in on the Winchesters having a MASS ORGY with Lucifer, several demons, and even The Prophet Chuck.
"Oh, Sammy, you naughty boy!" Dean said. He looked up from his passionate love making to see Castiel standing in front of him, attempting to gouge his own angelic eyes out.
"I'm blind! I'm blind!" Unfortunately, Castiel's eyes healed instantly, allowing him to see Sam perform a strip tease for Lucifer.
"Who's your daddy?" Lucifer said. Sam giggled in reply. "Oh, Cas, I'm glad you made it!" Lucifer said. "Did you bring lubricant?"
"SOMEBODY PLEASE KILL ME NOW!!!" Castiel scream.
"Now don't be like that, Cas," Dean said. He came behind Cas and hugged him tenderly. "You're all I ever wanted," he purred.
"Help! Rape!" Castiel scream. But quickly Castiel realized that he could not escape his inner desires. "No! No! No! Yes! No! YES!!!"
Dean unbuttoned Castiel's trench coat. "Rawr," said Dean. He pulled off Castiel's shirt, exposing Castiel's flawless chest, perfect tan, and symmetrical nipples.
Soon both Castiel and Dean had stripped off their pants, and they were now trying to decided who should give and who should receive. Eventually, they decided that Castiel would give first. "Wait! We need condoms!" Castiel shrieked.
"Now now, stop stalling, my sweet virgin angel," Dean said. However, being a generally kind person, Dean decided to appease Castiel and called Bobby to ask him to pick up a pack of Trojans.
While waiting for Bobby to bring condoms, Dean decided to have another go with Sam. The two of them had hot, passionate, incestual man-sex for thirteen minutes, before Bobby walked through the door in a purple speedo and his trucker hat with a bag full of condoms, lube, and strap ons.
"What are the strap ons for?" asked Sam.
"You'll see," said Bobby, deviously.
Dean and Castiel put on their condoms. Dean had a purple one, Castiel had a yellow one. Both were glow in the dark. As the two of them began, Sam and Bobby cheered on. "YEAH, BABY!" Bobby called, stroking his hairy belly.
Suddenly, a gaggle of angels appeared in the room. "What the fuck?" said Zachariah. He glanced over at Castiel, who was now climbing on top of Dean. "Castiel, this is entirely against regulations."
"Fuck the regulations!" Castiel moaned.
Suddenly, Sam tackled Zachariah from behind. Before Zachariah knew what was happening, Sam had ripped off his pants, and began showing off to Zachariah exactly how skilled he was in the art of love making. Unfortunately, Zachariah was impotent, leaving him unable to return the favor to Sam.
"Don't worry, Sam. I'll fill in for him," Bobby said, putting his hand on Sam's exquisite prick.
Bobby attempted to take off his hat, but Sam blocked his hand. "No… Leave it on."
Suddenly, the Trickster entered the room with a dozen hot cops. "This party's just getting started!"
"Who needs hell on earth when you've got orgies?" Lucifer said to one of his many demonic minions. "Now, where did that delicious Bobby Singer go?"
Two hours later, Castiel fell asleep in Dean's arms, proud that he had taken part in the greatest orgy known to man. Little did he know that this entire episode had been filmed by Bobby and was currently being distributed to people across the world. Needless to say, when the CW caught wind of this, they decided not to continue Supernatural for a fifth season.