At a book launch party, as Rachel reads aloud a short excerpt about the seminal event that provides the spine of the film, East Berlin, circa 1965 comes into view. It is a cold, dreary city, a stark contrast from the polished, sparking Tel Aviv we've just left. A trio of young Mossad agents — Chastain stepping back in as the younger Rachel, Stephan (Csokas) and David (Worthington) — have been brought together to pull off a critical mission in Israel's effort to bring Nazi war criminals to justice.
Their target is the monstrous Doktor Bernhardt (Christensen), notorious for the surgical maiming he did in the concentration camps. He has eluded capture, slipping into a role as an OB-GYN, a fertility specialist, hiding behind a new identity and a new name, Vogel.
Chastain turns in a searing performance as young Rachel, infusing her with aching vulnerability. Csokas brings a visceral life to Stephan's burning ambition, while Worthington embodies the tightly wound repression, righteousness and regret that will drive David. The two men make an excellent pair, tugging at Rachel's loyalties, as well as her heart.
Much of the drama is handled like a stage play in the claustrophobic confines of an East German apartment, where the young agents wrestle with the issue of humanity itself — and how much of it should be accorded to a monster like Vogel. As brutal dictatorships are being brutally crushed in the real world now on almost a daily basis, it's a particularly relevant question to consider.
For all the careful plotting and planning — a trap set, the quarry caught — there is a mistake. It marks Rachel in a way that shapes and scars her literally and psychologically for life, and sets in motion a series of choices that will haunt the others equally.
Those choices come to a head in Tel Aviv, where Tom Wilkinson comes in as the older version of Stephan, now wheelchair-bound, yet powerful still in the Israeli special forces. Ciarán Hinds turns up as the aged David, still troubled by what happened 30 years ago. There is a wrong to be righted, set up at the beginning by an extraordinarily chilling scene that is replayed in Rashomon-like ways throughout the film but that never loses its withering power over Rachel, Stephan, David or, as importantly, us.
Madden keeps the action of past and present moving along like freight trains, with a collision inevitable. A final chapter, written in blood by Mirren, shifts the balance of power of the film briefly in favor of the present, though ultimately the past wins the day.
The bridge between the two is an absolutely riveting and chilling performance by Christensen, who's gone up against James Bond a couple of times in the past. It would have been easy to play the Nazi surgeon as a black, soulless creature. What makes him so fearsome is the way he tries to seduce the young Mossad agents — not looking for love, but for them to recognize him as being as much a human as they are, to see the very flaws they despise in him reflected in themselves — and in this Christensen's nuance is lethal.
Lest you worry that this is a morality play masquerading in secret-agent clothing, have no fear. Madden has woven in a series of tightly coiled and excellently choreographed action sequences that are "Bourne Identity" quality, making "The Debt" as bloody as it is brainy. Breathe.