Nathan Fillion laughs in the general direction of your suggestion that he was concerned about Rick Castle’s fate, as soon as he got wind of the Season 6 finale.

“I wasn’t really worried,” the star of ABC’s Castle told Michael Ausiello during his visit to TVLine’s San Diego Comic-Con video suite. With the season-ending car crash feeding into a new piece of series mythology, “I think it’s going to be fun.”

Having brought Rick and Kate together, the show reached a point of, “What now?” he notes. “We need a new reason to come back and face a new season,” he says, and with the Sept. 29 premiere already on the books, “So far, so good.”

Turning to the Castle faithful’s latest recurring mantra — with one marriage ceremony up in flames, when will “Caskett” say ‘I do’?!” — Fillion says he himself wonders, “How much longer can we make people wait for a wedding?”

Also in this video Q&A: Fillion ponders for how many more years Castle might run (might it match Bones‘ longevity?), reflects on the recent Firefly reunion he took part in and reveals the handful of TV shows he’d love to guest-star on next.

– Screen Captures > Interviews > TVLine Castle Season 7 – July 2014