Sam's point of view

Of course it was one of Dean's beloved cassette tapes. Suddenly, he heard a flap of wings behind him. "Hello, Sam," Castiel said, appearing in the back seat of the Impala. The Winchester turned to him, surprised. "Cas?" "Yes?" Castiel replied in his usual monotone voice.

After a few seconds of silence, Sam opened his mouth to say something. "Listen, Cas. We didn't mean to—" "No, Sam. I'm sorry. All of this is my fault. I overreacted. I realize now that Crowley only helped me because he'll need me for something in the future. I don't blame you for wanting to help me at all costs. I appreciate it. And I'm sorry for... making you 'sleep,'" Castiel interrupted. "You were blinded by rage," Sam said dryly. "That's one way to put it."

Dean strolled back to the car, yawning halfway through. Distracted, he opened the driver's door with one hand while balancing two coffee cups and a paper bag in the other. "You can choose between a bacon cheeseburger or pancakes with maple syrup," he said with another yawn. Only now he looked at Sam.

"You really need to get some sleep…" Sam observed.

Dean looked over his shoulder, only to see Cas in the back seat. Before Cas could say a word, Dean spoke. "Cas? What are you doing here?" "I realized I may have overreacted." "Overreacted?" Dean's voice rose. "It took me HALF AN HOUR to calm the nurse that was there down. And that wasn't precisely easy!" "Come on, Dean. Cas already gave me a speech. Do you want one too? Let it go," Sam interjected. "Sorry," Dean mumbled, barely audible. Sam gave him a reproachful look.

"So now what?" "I say we head back to the bunker. The faster we find Metatron, the sooner this chaos ends," Dean said with resolve. With that, he started the engine. Minutes later, Sam was asleep again. Dean, however, was wide awake. Cas's sudden reappearance had flooded his body with adrenaline. But this effect only lasted a few hours.

At the next opportunity, Dean pulled over. "Hey Sam." "Hmmm?" Sam slowly opened his eyes and brushed his hair out of his face. "What's up?" "Can you drive for a while? I'm completely wiped," Dean asked. Castiel was still sitting silently in the back seat, staring dreamily out the window. "Sure. No problem." Sam took a long sip of his now-cold coffee. They swapped seats. It didn't take ten minutes for Dean to fall into a deep sleep.

Dean's point of view

When he woke up, he groaned and blinked against the low sun. "Well, Sleeping Beauty. Did you sleep well?" "I think I twisted my back. This is why I never sleep in my baby," Dean muttered. Sam grinned and steered the Impala into the garage of their home.

Only then did Dean realize what he'd said. "Ha-ha. Very funny," he grumbled. "Where's Cas?" The angel was no longer in the back seat. "He went inside already. Want help getting out?" Sam teased. "Jerk." "Bitch." "Come on, let's go in." "These last few days were insane." "You can say that again." They both laughed and walked inside.