CasualtySeries 28Episode 29: GravityBBC One Duration: 50 minutesFirst broadcast: Sat 15th Mar 2014, 21:30 on BBC One HDLatest broadcast: Sat 15th Mar 2014, 21:30 on BBC One WalesBig Mac and Iain are held hostage by an angry ex-soldier, while Charlie must learn the identity of a patient so the team can race to save her son.ContributorsAdrian 'Fletch' Fletcher:Alex WalkinshawTess Bateman:Suzanne PackerKathleen 'Dixie' Dixon:Jane HazlegroveJeff Collier:Matt BardockNoel Garcia:Tony MarshallLouise Tyler:Azuka OforkaCharlie Fairhead:Derek ThompsonMartin 'Ash' Ashford:Patrick RobinsonZoe Hanna:Sunetra SarkerEthan Hardy:George RainsfordRobyn Miller:Amanda HendersonLily Chao:Crystal YuRita Freeman:Chloe HowmanBig Mac:Charles DaleBen 'Lofty' Chiltern:Lee MeadIain Dean:Michael StevensonNatalie Fletcher:Claire CageKenny Archer:James WallworkBeth Archer:Rachel ElizabethBilly McVeigh:Martin DelaneyCassie Blackmore:Kezia BurrowsFee Yarrow:Emerald O'HanrahanDrew Yarrow:Will WhittingtonInspector Jane Crewes:Lesley HarcourtsCheckout Girl:Isla Jane SelleyDirector:Paul MurphyWriter:Stephen McAteerGenresDramaMedicalBrandCasualtySeriesCasualty: Series 28 Source: BBC Online