01:30HeroesSeries 4Episode 19: Brave New WorldBBC Two Duration: 40 minutes Audio described Sat 8th May 2010, 01:30 on BBC Two Northern IrelandAvailable for yearsWatch nowMr Bennet's life hangs in the balance, Samuel prepares to kill thousands and Peter and the others must band together to stop him and save Emma.ContributorsNoah Bennet/HRG:Jack ColemanMatt Parkman:Greg GrunbergSamuel Sullivan:Robert KnepperTracy Strauss:Ali LarterHiro Nakamura:Masi OkaClaire Bennet:Hayden PanettiereNathan Petrelli:Adrian PasdarGabriel Gray/Sylar:Zachary QuintoPeter Petrelli:Milo VentimigliaGretchen Berg:Madeline ZimaGenresDramaSciFi & FantasyBrandHeroesSeriesHeroes: Series 4 Source: BBC Online