Billy was up to his neck in trouble. I still thought he might get up. After all he seemed to have no long term effects from falling down a well.
The Man finds out that Luci has lied to him and she has multiple identities. It certainly spices things up.
Helen's complaint against the Man seems to be he leaves behind dead bodies. Not necessarily that he is responsible for killing them.
At least as the episode goes on. The Man leaves Helen behind and the realises that he needs her. Helen leaves a clue to her whereabouts. DI Rogers is on the trail.
As for Kostas, he is the big bad who lands in Australia. He did not like his pick up driver.
There are several effective twists concerning several characters.
One take I did get from all this. Given that Australia has a tough anti immigrant policy. After this it will get tougher, all the foreigners seem to be killing the locals!