Mark's Cuffin psycho
In the last season, he checks on Dobbie for six months on the app, then googles April from, what? Season 3? when he can't get Dobs.
What a stalker.
Season 2, when he stalks her across the country and fraudulently claims to be a student in order to meet her. Not to mention hacking Sophie's emails. Very dysfunctional.
shareStalking is his main hobby, deserves a thread of its own. There must be over ten major cases throughout the series.