Nobody Else (Part One) (S02E01)

In the opening of a two-part tale, DI Martha Bellamy finds her neighbor, barrister Jonathan Moxton, at his residence with severe head wounds, his wrists tied with a belt and a pair of panties gagging him. DS Jack Weston suspects that a sexual encounter may have taken a dark turn, leading to accusations aimed at Saul Hammond, the individual who discovered Moxton in this alarming state.