Even with only scattered historical references here and there, it’s a romp. We return to the bowels of the Met Police, where DCS Brian Boyce (Hugh Bonneville) and his loyal deputies have been slogging away trying to chase down a trail that’s gone very cold indeed. They narrowly missed nabbing convict John Palmer (Tom Cullen, suave as ever) at the end of season one; now, he’s living the high life in Tenerife, swindling British tourists by selling them timeshare flats.
