In the penultimate episode, the net begins to close not around Ed but Jim.
But first things first, Mark Latimer is pulled from the water suffering hypothermia. Beth tells him to live in the present instead of the past, and Chloe asks him why they aren't enough for him. Sometimes I do think there's a subtle sexism going on here—that Mark is fixated on the loss of his son in a way he might not have been if it had been his daughter?
Speaking of daughters, Hardy's wants to leave town after being really embarrassed by some digital photos of her that got passed around the school. Miller tells Hardy to tear up her train ticket, and he eventually dresses down the boys who started the whole thing and does as Miller suggested. "I've been too nice," Hardy tells Miller, and her expression at that is priceless. Olivia Colman has the best reactions.
Anyway, they're unable to keep Ed in custody due to lack of hard evidence (though I would have thought a dirty suit with blue twine in the pocket would be enough?), so he's released on bail and told not to contact Trish or her family either directly or indirectly. Ed slouches off home to drink and his daughter comes around to lash him a bit, too. Later, while moving pallets at the store, Ed finds a bag of blue twine, shows it to Harford, who examines it and notes there are blood stains on it.
Ian comes into the station and tells Hardy and Miller that he had put spyware on Trish's computer. They drill him down and he is forced to admit he didn't put the spyware on, but he's not ready to tell who did. They give him until that night to cough up the name, and he does eventually call in and let them know it was Leo.
Leo is oddly contrite during his police interview. After everything we've seen of him, it doesn't feel honest that he would behave in such a way. He admits to doing it, says Ian was a teacher who helped him a lot, finally admits he was at the party for a little bit...
Meanwhile, Cath's spidey sense begins to tingle and she finds a box of condoms in Jim's car, complete with timed and dated receipt. Guess when they were bought? The afternoon of her party, natch.
Jim gets pulled in, and it's confirmed that he towed one of the other victims' cars, and Cath also confirms that she was away the two dates of the other two attacks. Uh-oh, Jim.
BUT. In the midst of all this the cab driver's wife discovers his porn on his computer and then discovers Trish's keychain in a locked drawer in Lucas' workshop. Of course Lucas drives up just in time to see her finding the evidence. Uh-oh indeed.