After ambushing Al-Zharani at a bank and blackmailing him - first with pictures outing him as gay and then Carrie's more unsettling threat to deport his daughter - he reveals the location of his next meeting with Walker (Chris Chalk).
Up until this point in the episode, the whole 'terrorist of the week' thing beginning to emerge was in danger of getting a bit samey. I understand that a mastermind like Abu Nazir wouldn't exactly signpost himself and the knot to be unpicked is tight and tangled. But Homeland was almost in danger of getting bogged down.
The show has proven before that it works best as a character piece first and a terrorism thriller second. 'The Weekend' - in which Carrie and Brody were completely removed from the chaos around them - is still the pinnacle of the series.
And that episode wasn't a fluke either. The beautiful blues-scored segment where Carrie bawled and angrily dumped wine bottles after her aborted date with Brody, the extra few seconds he spent sat outside her house, and Saul's tragic peanut butter dinner at the CIA were this week's most captivating moments.
In fact, it was more of a joy to see Carrie and Brody revert back to their former selves than see the terror plot advance. The sturdy persona Carrie's been desperately trying to will herself into recently crumbled in her frantic, desperate threats to Al-Zahrani.
She hasn't been that panicked since she changed her mind about Brody and, in a kind of macabre way, it was nice to see that side of her back. Having her distressed character as the driving force of the series is arguably what made it so compelling and easy to get wrapped up in.
Brody, meanwhile, was menacing in this episode, as he finally came face-to-face with Vice President Walden - the man instrumental in the death of Abu Nazir's son.
His sinister smiles when Walden asked him to run for office, his glare when Jessica objected to the pressure his campaign would put on the family, the way he manipulated Mike into talking her round by extending an artificial olive branch - it was like watching him stare down the Capitol building all over again. Like Carrie, his mask is slipping. He's firmly back in the villain role after weeks of ambiguity.
It's easy to think that you've got Homeland all figured out. But it's not a show that is content to coast for too long. Maybe the reason why the hunt has seemed a little lacklustre is that until now the fear of getting "hit again" has been the only danger.
So when the meeting between Al-Zahrani and a pawn Walker paid to take his place ends in a bomb attack, it hits with enough force to make you believe you were standing right in the blast zone. It's a brilliantly done scene - authentic, terrifying and devastating.
Crucially though, it brought a sense of jeopardy to Homeland just as it was in danger of getting forgotten about. The episode closes with a bloodied and scarred Carrie in her hospital bed vowing to track down the CIA mole, all the while crying over losing Brody to his family and to congress - a promising suggestion that the winning balance of action and human emotion achieved by the end will remain intact.
Homeland continues on Sunday nights at 9pm on Channel 4.
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