Joan Allen portrays the fictionalized Guerin (here named Sinead Hamilton), the reporter who wants to get the bad guys. Patrick Bergin is Mackey, the cop who bends the rules to do the same. The problem is that Mackey is the more interesting, and flawed, character. Allen, as in "The Contender," is just playing a dull type: the determined journalist. Despite its apocalyptic title, the overall impact of "When The Sky Falls" is minimal. Starring Joan Allen, Patrick Bergin and Liam Cunningham. Directed by John MacKenzie. Written by Michael Sheridan, Ronan Gallagher and Colum McCann. Produced by Nigel Warren-Green and Michael Wearing. No distributor set. Drama. Not yet rated. Running time: 105 min.