Once again, in Season five (5) of "New Tricks", the team mentioned above is faced with horrendous "cold cases" that no one wants to deal with and they solve some really nasty cases most splendidly using some rather unorthodox and (what is considered "old fashion" methods) driving "the powers that be" completely CRAZY/5(). New Tricks is a British television procedural crime drama, first broadcast in In February , BBC One announced the show would end after series The show's title is taken from the proverb "You can't teach an old dog new tricks".. The series follows the work of the fictional Unsolved Crime and Open Case Squad (UCOS) of London's Metropolitan Police Service, a squad of retired police Created by: Nigel McCrery, Roy Mitchell. All episodes of Series 5. Loyalties and Royalties. 4 / 8 The team investigate the death of the lead guitarist in a famous 70s rock band.