He believes his role gives rise to important questions about national identity, politics and police corruption that people need to talk about.
“We’ve seen undercover operations within criminal and terrorist organisations in dramas like Line of Duty,” he mused.
“But the idea that there were undercover officers inside legal organisations eavesdropping on conversations, feeding back information and sometimes having relationships with people without telling them who they really were, is outrageous.”
Sherwood begins Monday, June 13, on BBC One and iPlayer, and episodes will continue on Mondays and Tuesdays at 9pm across three weeks.
Meanwhile, the full interview with David Morrissey will run in this week’s Radio Times out now.