- Season 1 finale: John goes to Hell.
- Season 2 finale: Demons leave Hell.
- Season 3 finale: Dean goes to Hell.
- Season 4 finale: Lucifer leaves Hell.
- Season 5 finale: Sam and Adam go to Hell.
- Season 6 finale: Leviathans leave Purgatory.
- Season 7 finale: Dean and Cas go to Purgatory.
- Season 8 finale: Angels leave Heaven.
"It’s true that Jensen Ackles could probably have on-screen chemistry with a potted plant, but he really brings his A-game when playing scenes with Collins, in a different but equally compelling way from his effortless rhythm with Padalecki, since Dean and Cas have such an odd, symbiotic relationship that has helped them both evolve and rediscover their faith over the past few seasons."