Jaspers' Warp, sometimes referred to as Crooked World,[Note 1][1] is a superhero comic book storyline from the British Captain Britain strip printed across several Marvel UK titles between 1981 and 1984.

While it was first used in print by Moore in the episode "Rough Justice" (in The Daredevils #7) it is generally agreed to have been devised by the strip's initial writer, Dave Thorpe.

The character was resurrected by Dez Skinn in 1979 as a guest star in The Black Knight, a serial in Hulk Comic, with the story now created in-house by Marvel UK, written by Steve Parkhouse with art from John Stokes and Paul Neary.

He and Neary devised a story span out of the Black Knight strip, featuring Captain Britain on an alternate world in order to allow Thorpe's ambitious plans without disrupting the main Marvel Universe.

Thorpe introduced some concepts that would run in Captain Britain-related titles such as Excalibur for years to come – the Alice's Adventures in Wonderland-influenced Crazy Gang and amoral Saturnyne, who was visually modelled on actress Lauren Bacall.

While both the strip and publication drew acclaim (including an Eagle Award for 'Best Comic'), The Daredevils would only run for 11 issues before low sales saw it cancelled in November 1983.

Another sequence saw the heroes of Captain UK's Earth massacred by the Fury in flashback; rather than using alternate versions of Marvel characters Moore and Davis used renamed versions of classic British comic characters, including Tom Rosetta (Tim Kelly from Kelly's Eye), Robot Andy (Robot Archie), Gaath (Garth), the Arachnid (The Spider) and Roy Risk (Dan Dare).

Following the end of The Daredevils, the strip would transfer to the recently rebooted Mighty World of Marvel, where after seven more chapters the story finished – having introduced Meggan and killed off Merlyn.

[4] Captain Britain and Jackdaw are transported from Otherworld to Earth-238 by Merlyn, immediately stumbling on a bank robbery being committed by Mad Jim Jaspers and the Crazy Gang, driving them off.

Captain Britain successfully saves London from an attack by a strange animated junkyard creature but the feat fails to convince the authorities, particularly the brutal armed paramilitary Status Crew, of his good motives.

He finds a mysterious liquid that has created an intelligent rat called Algernon, and traces the source to Majestrix Saturnyne of the Dimensional Development Council.

Captain Britain is able to defeat Slaymaster after a battle on Denmark Street, and takes Betsy and two other surviving telepaths – her lover Tom Lennox and their friend Alison Double – back to Braddock Manor.

However, in the resulting battle two members of the Executive are killed, leader Wardog has his cybernetic arm torn off and further casualties are only avoided when the Fury is briefly unable to register Zeitgeist, giving Captain Britain and Fascination the chance to bury the machine.

Captain Britain and his remaining allies head to London to help but are largely forced underground, with Jasper's warping abilities causing problems for Allison and Betsy, and Linda still traumatised by the return of the Fury.

Despite his best efforts, Captain Britain finds Jaspers' ability to change reality on a whim makes him impossible to fight, and things get worse when the Fury – having escaped the chasm near Braddock Manor – arrives.

[8] Despite his subsequent enmity towards Marvel Comics, Moore still thinks positively of the storyline, calling it "fun" and feeling it was overshadowed at the time by his work on Marvelman and V for Vendetta.

[4] Davis would take over as writer himself briefly before being joined by Jamie Delano on the series, which would continue in The Mighty World of Marvel before becoming the lead strip of a new monthly Captain Britain magazine in January 1985.

Having made a brief introductory cameo in the "Jaspers' Warp" story, Meggan was given a large supporting role and would go on to be Captain Britain's partner for much of his subsequent fictional adventures.

Both the Crazy Gang and Saturnyne would reappear both in Captain Britain's solo adventures and in Excalibur, which would also feature the Warpies – a group of children mutated by the effects of Jasper's powers.

Moore, whose earlier grievance had been compounded by this permission having been bypassed for some of his Doctor Who Weekly material and what he perceived as bullying tactics by Marvel in their legal action over Marvelman's name, refused – much to Davis' chagrin.