Episode 4

An unusual series of incidents occurs on the London underground, and Will and Caroline find themselves lumbered with representing a man involved. As they delve deeper into the case, they find him difficult to get a handle on, and struggle to decide if he is just a harmless eccentric, or something much creepier. Will takes the opportunity to get to know his mentor a little better - and soon regrets it. Meanwhile, Ashley begins making some political moves.