Here's a fun new joke: How many writers does it take to finish a 'World War Z' script when the film has already completed shooting and the release has been pushed back to next summer? If you answered "all of them," you're probably right.

According to Deadline, even though Damon Lindelof was brought on to figure out the ending to the story, the script was actually finished up by Lindelof friend and 'Cabin in the Woods' director Drew Goddard. Goddard also recently wrote Steven Spielberg's upcoming 'Robopocalypse.'

But that wasn't enough, and now writer Christopher McQuarrie ('The Usual Suspects') has been asked to come in and see what he can do to help out with the troubled script. Of course, that depends on his schedule as he's also been tasked with working on Doug Liman's 'All You Need is Kill,' a new Tom Cruise film.

'World War Z' has been plagued with issues, with Paramount declaring seven weeks of reshoots after admitting they only had 45 minutes to an hour of usable footage. The film, directed by Marc Forster ('Stranger Than Fiction,' 'Stay'), is based on the popular novel by Max Brooks and tells the story of a U.N. official who races around the world to stop an impending zombie epidemic.

The film stars Brad Pitt and Mireille Enos ('The Killing'), but none of that matters if they never finish the damn thing.

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