All eleven two-part episodes from series 11 and 12 of the BBC crime thriller following the investigations of a team of forensic experts led by Dr Leo Dalton (William Gaminara), Dr Harry Cunningham (Tom Ward) and Dr Nikki Alexander (Emilia Fox). The episodes are: 'Apocalypse', 'Suffer the Children', 'Hippocratic Oath', 'Double Dare', 'Peripheral Vision', 'Safe', 'Death's Door', 'Terror', 'Judgement', 'The Lost Child' and 'Finding Rachel'.