The end is nigh for Syfy's shark movie series with a new poster for The Last Sharknado: It's About Time. Five long years and five questionable sequels after a basic cable schlockfest became an unexpected Twitter sensation, the venerable series is going out in a hail of chainsaws, C-list actors, and, of course, plenty of airborne sharks.

Syfy had made a name for itself as a factory for no-budget, no-worries productions, churning out monster movies and disaster flicks galore - and Sharknado was the latest in that trend, but it ended up being their most successful movie franchise ever. Something about a storm of sharks being flung about Los Angeles in a tornado caught on, celebrities as diverse as Patton Oswalt and Mia Farrow began to tweet, and almost overnight a franchise was born way back in 2013. And now, it's coming to an end.

As TV Line reports, the new poster confirms that this latest installment will involve time travel, first suggested by the Sharknado 6 teaser trailer from earlier this year. The main poster (below) shows a chainsaw-wielding Fin (Ian Ziering) flanked by April (Tara Ried) in a cowboy outfit and Nova (Cassie Scerbo) in medieval armor. Behind them we can see a castle and some dinosaurs, so we can probably add prehistoric times, the Dark Ages, and the Old West to the list of new Sharknado targets. In addition to the main image, they've also released four character posters featuring the three leads plus one for Vivica A. Fox's returning character Skye.

The Sharknado movies have always been a guilty pleasure for the fans who have stuck with them. The overwhelming social media response led first to one sequel, then a second, and then another, each ramping up the levels of ridiculousness while keeping the budget somewhat low, comparatively. By the time the sharks went to space in Sharknado: The 4th Awakens, they'd mined as much material from the concept as they could reasonably expect.

It's probably for the best that this will then be the final Sharknado. Last year's Sharknado 5: Global Swarming proved that the series had already begun to run out of ideas and that no amount of gimmicks or stunt castings were going to save it. Rather than going out with a whimper, it looks like they're sticking to what works and throwing everything into one last ride. While they're not likely to recapture the cultural ubiquity of peak Sharknado, maybe they can still be the only show on Twitter just one more time.