As the final season of Supernatural edges ever closer, the cast has become increasingly reflective of their time working on the popular CW series.Speaking with TV Guide, Misha Collins -- who has played Castiel since 2008 -- looked back on the series and became tearful as he recalled how emotional it was to film Supernatural's 15th season.

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"So, we’re coming back to start Season 15 right now and every day is painful because every day is a new last," Collins said. "We just started episode 2 and we all gave each other a group and said, 'Aww, this is the last first day of shooting episode 2 of the season,' and there’s going to be a lot lasts."

"You know, I think we’re trying to make the final season good," he added. "For a change. And we’re also just struggling with, ya know, a long goodbye."

When it comes to the legacy of Supernatural, Collins already knows what he wants the show to be remembered for.

"I have a very specific hope for the legacy of Supernatural," he explained. "One, that people remember it. And two, that that fandom is known for being charitable, and kind, and compassionate. I think we have been cultivating that, but I would love to see that be a legacy, like, I would love to see other fandoms try to emulate Supernatural in terms of helping one another and helping others."

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Returning Thursday, October 10 at 8 p.m. ET/PT on The CW for its final season, Supernatural stars Jensen Ackles, Jared Padalecki, Misha Collins and Alexander Calvert.