Marcella

ITV, 9.00PM

 This Anna Friel vehicle continues to career from shock tactic to unlikely plot twist as it reaches the halfway point. Tonight, Kevin Hoffs’s blue lorry offers a vital clue and the full extent of the killer’s depravity becomes apparent. Meanwhile, faded pop star Reg (Nigel Planer) tells his manager Alan (Keith Allen) that he wants to come clean to the police. GT