As one of the biggest police investigations in British history gets underway, Derek Conlon is astonished to learn that he too has been poisoned. But having crossed into the world of espionage, that’s only the beginning of his problems.Episode 4 released Monday August 3, 2020. Narrated by Diana Magnay. Written and produced by Robert Mulhern. Production support by Chris Scott, and Dave Terris. Original Music by Derek Conlon. Digital by Phil Whiteside and Ronan Hughes. Legal support by Matt McKenzie. Graphics and Design by Matt Simpson and Sophia Leale. Continuity announcement by Kit Bradshaw. Video by Alex Marshall and Cat Roper Davies. Social Media support from Adam Tate. Archive from Simon Windsor and thanks to former Moscow Correspondent Alex Rossi.