A full-length trailer for the upcoming eighth season of Doctor Who‘s modern iteration has arrive at last; building on the teasers released in recent weeks, this preview suggests that the Doctor’s latest regeneration (brought to life by Peter Capaldi) isn’t just older-looking on the outside, but that also his disposition is closer to that of a seasoned warrior, more weary yet knowledgable and wiser than ever he was before.

Of course, when you’re The Doctor, that doesn’t stop you from undertaking even more zany adventures spanning time and space – encountering many an enemy both new and familiar, along the way, but also some friends as well. Indeed, returning for Doctor Who season 8 is Jenna Coleman as the Doctor’s companion Clara Oswald; Clara won’t be the only human at Capaldi’s side, though, as she’s to be joined later in the season by Danny Pink (Samuel Anderson), one of her fellow teachers at Coal Hill School.

We don’t get a good look at Danny in the new trailer for season eight, though we do get some flashy action, glimpses at spaceships and different enemies (and the classic baddies that are Daleks), along with what appears to be fan-favorite Silurian warrior Madame Vastra (Neve McIntosh), delivering the perennial “Here we go again.” In spite of that line, perhaps, the overall tone of the trailer is decidedly darker and more ominous that those for recent seasons of Doctor Who – though, not so dark that a shot of a dinosaur rampaging around England looks out of place, mind you.

Current Doctor Who head writer/show-runner Steven Moffat has promised that season eight will be more “surprising” than recent series have been. That’s good to hear since, after three seasons of overseeing the beloved sci-fi series, Moffat seems to have used up most of the tricks in his old Doctor Who magic bag – and could stand to mix things up a little, after having formed a bit of a habit of repeating himself during Matt Smith’s run as The Doctor.

Hopefully, the presence of new faces onscreen along with some fresher eyes keeping watch behind the camera – that includes well-respected filmmaker Ben Wheatley (Kill List, A Field in England) on the first couple episodes of season eight – will help to liven up Moffat’s ongoing act. To quote Capaldi’s Doctor from the trailer, “I’ve made many mistakes. It’s about time that I did something about that.”

Doctor Who season 8 premieres on August 23rd, 2014.