By Lisa Schwarzbaum
Updated August 09, 2011 at 04:00 AM EDT

A deep love of True Blood is the main reason an American might sample Griff the Invisible, this minor exercise in Australian whimsy: TB star Ryan Kwanten plays Griff, an oddball office drone by day and self-styled superhero by night who attracts the interest of a cute oddball girl (Maeve Dermody). Then more oddball stuff happens — at such a slack pace that, like most of Griff’s superheroic lab experiments, the whole fantasy/ love story fizzles out. C?