21:00Silent WitnessSeries 15Part 2: And Then I Fell in Love, Part 2BBC One Duration: 1 hour Audio described Mon 20th Aug 2012, 21:00 on BBC One CambridgeshireAvailable for yearsWatch nowHarry and Nikki make a crucial connection between the dead girls and sex-grooming victim Shannon, but is it too late for Hannah and Lauren?ContributorsDr Nikki Alexander:Emilia FoxDr Harry Cunningham:Tom WardUmar:Elyes GabelAbdul Aziz:Sanjeev BhaskarDI Johnny Vickers:Sam TroughtonDS Ayesha Masood:Thusitha JayasunderaLauren:Georgia BourkeKamran:Naveed ChoudhryAmy Chester:Madeline DugganDirector:Keith BoakClaire Kelly:Juliet CowanVernon Reid:Joe TuckerTrudie:Emma AmosSandra:Lizzie RoperGenresDramaCrimeBrandSilent WitnessSeriesSilent Witness: Series 15 Source: BBC Online