Summary:Just when audiences thought they'd heard the last of the demented killer Jigsaw (Tobin Bell), here comes Saw IV, continuing his trap-filled legacy -- this time, targeting the last remaining officer who has touched the case, SWAT Commander Rigg (Lyriq Bent). As FBI agents Strahm (Scott Patterson) and Perez (Athena Karkanis) begin to dig through the remains of Jigsaw's crime-scene hideout, a new puzzle presents itself, with Rigg as the pawn in another deadly game filled with moral quandaries and torture-filled traps. Director Darren Lynn Bousman returns to the series after helming both Saw II and III, with a script penned by Feast writers Patrick Melton and Marcus Dunstan.