21:00Silent WitnessSeries 26Hearts of Darkness, Part 1BBC One Duration: 57 minutes Audio described Mon 23rd Jan 2023, 21:00 on BBC One Wales HDAvailable for yearsWatch nowLevelling-up leaders and environmental activists clash in a small town trying to look to the future. With a sabotaged train and a dead mayor, the activists become suspects.ContributorsDr Nikki Alexander:Emilia FoxJack Hodgson:David CavesDr Gabriel Folukoya:Aki OmoshaybiVelvy Schur:Alastair MichaelCara Connelly:Rhiannon MayDI Jill Raymond:Jemma RedgraveBob Stratton:Nicholas GleavesWriter:Michael CromptonDirector:Christine LallaProducer:Josh DynevorGenresDramaCrimeBrandSilent WitnessSeriesSilent Witness: Series 26 Source: BBC Online