The best bits about this show all come as fantastic sci-fi surprises, so there won't be any killjoy spoilers here. Bec Hill is an Australian comedian posing as a time traveller, giving advice to the audience and also her less confident past self on how to avoid climate disaster, do memorable stand-up, and not become part of the 1% evil elite.

There are several smart plot twists and incredibly inventive use of props (both lo-tech and hi-tech) and she gives a heartfelt thank-you to her crowd at the end, saying she's been working on the show for a very long time. The ambition and creativity are strong with this one, and there are plenty self-referential bits about her becoming successful in the comedy world, as well as more global observations about her fears for an AI-run, drone-ridden, Amazon-bought, toxic capitalist future.

Not all the jokes make it into orbit and some of the wordplay gets a bit out of hand. But her Doctor Who / Dark Knight / Mad Max references and range of DIY gadgets and weapons should keep sci-fi nerds entertained, even if they can't save the world from its inevitable destruction.

Pleasance Dome, until 25 Aug, 5.40pm, £8–£10 (£7–£9).