The Noise Next Door are five hyperactive, hypermobile performers, whose lively and unpredictable show is a exemplar of high-quality, high-energy improvised comedy. In a twist on the usual format, they structure their show around the establishment of an agency to fight evil, asking the audience for suggestions regarding their underground lair, the identity of their nemesis, and the format of a secret mission. Its a clever set-up, marking their show out as distinct from the many other improv troupes on the Fringe, and with the help of some inspired audience contributions they create a brilliantly funny hour of preposterous scenarios and over-the-top characters. The interplay between this close-knit group and their astounding physical, facial, verbal, and lyrical dexterity is impressive and consistently entertaining. Accompanied by a quick-thinking guitarist, they also belt out some musical numbers, in an impressive range of genres, including some lightning-fast freestyle rapping. Overall, this is fun, well-executed and original improvised comedy.