John Simm is set to reprise his role as Detective Superintendent Roy Grace in season six of the ITV drama. The actor, known for Life on Mars and Mad Dogs , will return to the latest instalment of Grace alongside Richie Campbell, who plays DI Glenn Branson, and Zoë Tapper, who plays Cleo Morey. A synopsis for the series reads: "Tensions run high in East Sussex CID this series as, several months on from the arrest of ACC Cassian Pewe, Grace’s team is in the midst of an anti-corruption inquiry,