Chris Reilly as Ray Murray, Sam's stepfather who owns a local builder's yard (series 1).

Sara Lloyd as Patricia Rose, wife of murder victim Stevie Rose (series 1).

Gareth Jewell as DI Carl Roberts (series 1).

Suzanne Packer as Chief Inspector Layla Davies, head of police.

Jack Parry Jones as PC Luke Lloyd, Gina's long-term work partner.

Nia Roberts as Linda Murray, Sam and Gina's mother.

Catrin Stewart as PC Gina Jenkins, Sam's sister.

Jacob Ifan as Sam Jenkins, a loner who works for a local distribution firm.

From that stumbling block I started to think: ‘Why don’t we reflect the linguistic diversity of a place like Port Talbot?’ For all of us who are bilingual, the reality is that we live our lives through two languages.' Cast There are quite a small percentage of speakers compared with Carmarthenshire, Ceredigion, Gwynedd. Port Talbot isn't the strongest place for the Welsh language. Then the conversation about language started to happen.

Series creator Roger Williams said of the bilingual nature of the script 'It was very much about story a strong story that would get people tuning in every week to see what would happen. The series was concurrently available on the BBC iPlayer as part of the BBC's ongoing relationship with S4C.

Initial broadcasts carried entirely English subtitles (although these need to be accessed by the viewer, and do not appear on screen), while repeat airings carried encoded English subtitles for scenes spoken in Welsh. The second series was broadcast on S4C in February–March 2020. The show, set in Port Talbot, Wales, stars Jacob Ifan as Sam Jenkins, a loner who becomes entangled in a web of lies after coming into possession of a gun, and Catrin Stewart as his sister Gina, who is a police detective. Bang is a bilingual crime drama English/Welsh television series, created by Roger Williams, that was first broadcast on S4C on 10 September 2017.

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