How has dean seen cas naked on the impala in canon?

ssjdebusk:

7×23, Cas was kind of passive aggressive about Dean praying to him. He didn’t answer and then eventually THIS is how he answered him. I would go into a huge rant about Cas and season 7 and Destiel and the shift in their dynamic and the fight they’re in for basically all of season 7, that gets put on pause when Cas dies and Dean’s drinking and season sevennnnnnnnnnnn but I’m way too drunk (I am doing a great job of typing atm I must be sobering up) to try to articulate it.

So I will just answer your question. Season 7 finale. Episode 23. Cas shows up on Dean’s car, naked, covered in bees. 

For anyone who skipped season 7 because Cas “wasn’t in it” you’ve missed out on probably imo ½ the good destiel scenes at least and is basically most of the context for them moving forward. For the love of God watch season 7 it will blow your mind.