Water Rats

Alex is having disagreements with her neighbor and is at the same time harassed by someone leaving her weird gifts which freaks her out.

A discovery of a wetsuit leads to a investigation of a woman who went missing two and a half years ago and everything points to the involvement of her husband.

When the Nemesis responds to a report of gunshots being fired, Sykes and Quinn come across two teenage boys who have been injured, one fatally, after the gun they were playing with exploded.