Part one of two. Docudrama about the crimes of Irishman Kieran Kelly, who in 1983 confessed to a series of brutal murders using the London Underground's Northern Line to target victims. Ned Dennehy plays Kelly in a dramatisation of his extraordinary confession that uses the killer's own voice from a police audio interview, with the actor lip-synching to bring to life this incredible scene of a serial killer describing his crimes.

Part two of two. Docudrama about the crimes of Irishman Kieran Kelly, who in 1983 confessed to a series of brutal murders using the London Underground's Northern Line to target victims. Ned Dennehy plays Kelly in a dramatisation of his extraordinary confession that uses the killer's own voice from a police audio interview, with the actor lip-synching to bring to life this incredible scene of a serial killer describing his crimes.