The much-anticipated prequel to Prime Suspect, Tennison [w/t], has begun filming on location in London. Stefanie Martini (Doctor Thorne, Endeavour, Emerald City), Sam Reid (Belle, The Riot Club) and Blake Harrison (Dad's Army, The Inbetweeners) join forces to star in the 6 x 60 minute series which portrays the young Jane Tennison (Stefanie Martini) at the beginning of her career, revealing why she became such a complex and formidable character in the Metropolitan Police. Sam Reid and Blake Harrison are cast as Jane's superiors DCI Len Bradfield and DS Spencer Gibbs. Alun Armstrong (New Tricks, Little Dorrit), Ruth Sheen (Unforgotten, Inside No.9), Lex Shrapnel (Medici: Masters of Florence) and Jay Taylor (Promise) are cast as crime family members Clifford, Renee, John and David Bentley. Jessica Gunning (Jericho, Fortitude) is also cast as fellow WPC Kath Morgan alongside Andrew Brooke (Babylon, Da Vinci's Demons) as Jane's senior officer Sergeant Harris. Nick Sidi (Silent Witness, DCI Banks) and Geraldine Somerville (Silent Witness, New Tricks) are cast as Jane's parents, Andrew and Joyce.