Screenwriter Damon Lindelof has been brought in to save Paramount’s zombie movie World War Z, The Hollywood Reporter said.

The big-budget movie starring Brad Pitt, who also is one of the producers, has been troubled. Its release has been pushed from December 2012 to June, 21 2013, and is awaiting significant reshoots. Lindelof, the Lost co-creator and co-author of Ridley Scott and Fox’s Prometheus, is said to be focusing on World War Z's third act. The production hopes to begin reshoots in September or October.

World War Z, based on the 2006 novel by Max Brooks, is intended to be a zombie picture with sociological and political overtones. It also stars Mireille Enos (The Killing), James Badge Dale and Anthony Mackie.

Marc Forster is directing the movie, which shot last year in various European locales.