If you’ve always wanted to do jury service but have never been called up, BBC One’s brand new drama Showtrial gives you a juicy court case to get your teeth stuck into.The series – from the makers of Line of Duty and recent hit Vigil – begins as Talitha Campbell (rising star Celine Buckens in her first major TV role), the daughter of a billionaire property developer, is arrested and charged with conspiring to murder her university classmate Hannah Ellis.