Sam listens to Dean's actual voice mail. Season 4 ep 22
Before Sam could start drinking the demon blood, his phone rang with a call coming through. Not wanting to listen to Dean's judgmental tone and nasty words in person, he lets the call go to voice mail.
Once the ringing stopped, a minute later, a notification was heard, with Dean's latest voicemail attached. Despite not wanting to hear it, Sam couldn't help himself in pressing the button, allowing him to know what his brother truly thinks about him.
"Hey, it's me, look I'll just get right to it, I'm still pissed, and I owe you a serious beat down" Before Sam could stop the message in anger and grief. The message continues. "But I shouldn't have said what I said, I'm not dad. We're brothers, we're family, and no matter how bad it gets, that doesn't change. I'm sorry."
The message cuts and tears in Sam's eyes make it hard to see. Sam tries to call Dean back, but Dean isn't picking up. John Winchester always said that feeling and knowing are two different things, but with Sam and Dean, that isn't the case. They may know how to kill hundreds of monsters, but when they can feel that the other is in danger, it is normally right.
And Sam currently has that feeling of danger, so before Ruby could convince him to do anything, Sam rushes to the Impala and quickly starts the car. Ruby tries to stop him, but that doesn't stop him from roaring the car and driving down the road as fast as possible.
Meanwhile, Dean escapes with Castiel and disappears from the pure white angel room and appears in the back seat of the impala, with Cas beside him and Sam driving, not noticing them yet.
"Sam, if you could pull over that would be acceptable," Cas says with his deep voice. Startling Sam, who hits the brakes suddenly, making Dean and Cas crash into the front seats.
"Dean? Cas? Dean!" Sam yells, jumping out of the car and running towards the back seat where Dean is rubbing his head.
"Sam, you're banned from driving Baby if you stop like that" Dean smirks, while Sam grabs him and hugs Dean with all his might. "So, you got my message?"
"Yes, I got your message. I'm so sorry! You're right, we're brothers, we're family. No matter what."
"No matter what".
"I thought you changed the message! This was supposed to end differently! Sam was supposed to drink that demon blood and bring Lucifer back!" You will pay for this!" Zachariah shouts at the other angels before killing them all.
Meanwhile, in a dark room, Chuck throws his laptop. "This was not how it was supposed to end! What happened?!"
While watching Sam and Dean smile at each other and make plans together on how to fix all their mess, Cas smiles.
