"That's called importing drugs. It's sort of the opposite of what we do."
Things get even more dramatic and dangerous this week for our underpaid Customs officers working on a shoestring and risking our lives, showing the real costs. Yet we also see why they're doing it. A young Tommy, ironically the son of one of the kingpins himself, finds himself hooked on heroin through a perfectly ordinary and natural set of circumstances, and we slowly see his decline and death. it's harrowing, and it happens to the very father who... orchestrates the shocking ending.
Guy is getting deeper and deeper into his "legend"... and thereby connecting well with Don, who well knows the appeal and the costs. And he's under pressure to show what he can do by actually importing large quantities of heroin which, well, he can't do. But, in a delightful sequence, Don solves the problem in arranging a deliberately botched raid by armed police in Felixtowe. I also love the sequence in which he desperately gets some customs officers to back off. Steve Coogan absolutely steals every scene he's in.
Kate and Bailey also have some excitement, getting locked in while sneaking around but getting away with it through sheer desperate cleverness. But the moment of sheer drama is Shaun's cover being blown, and he and his family subsequently escaping a fiery death by the skin of their teeth. It's utterly gripping, and really sells the risks of undercover work... yet, earlier in the episode, Shaun confesses just how much he's loving it.
Still utterly gripping, even if much of the episode is necessarily setting things up.