ThisyearSilentWitnesscelebratesits20thanniversarywithfiveexplosivestoriesthattaketheshowintonewandunchartedterritoriesaswellasdelvingintothemurkydepthsofcitylife.FivecontemporarythrillersthatstartamongstthefamiliarlandscapesofLondonandendupinthedustyscrublandofMexico.