As Hitchcock himself admitted, we're not meant to care about the titular secret of "The 39 Steps" — the pleasure's not in the details of why, but how. Too few makers of modern capers heed this warning, pausing so often to explain some obscure element of backstory that it's a wonder more of them don't go in for historical epics and literary adaptations. Not so for Tony Gilroy, whose 2009 film "Duplicity" is perhaps the genre's best recent entry: as soon as we learn the whole deal is one big MacGuffin, a contest over the formula for a baldness cure, we're free to enjoy it for what it is, a witty and well-built adult comedy.
Like Hitchock's cameos, Gilroy may be poking a bit of fun at himself here — he wrote each of the three prior "Bourne" films, and he co-wrote and directed the forthcoming franchise reboot. But his eye for pacing, honed on the genre's more serious (and high-quality) end, stands him in good stead in "Duplicity." Aided by funny, sharp-tongued performances from Julia Roberts and Clive Owen as romantic and clandestine antagonists, the film's structure, moving back and forth in time, manages to hide the truth in the side pocket of the story. In its pleasantly off-kilter hybrid of narrative discovery and romantic comedy, "Duplicity" is a worthy descendant of "The 39 Steps," squeezing more out of both by weaving them together so effectively.
The best example comes late in the film, as an executive at one of the two warring conglomerates (Tom McCarthy) rages, blindfolded, against an empty conference room. Roberts' character hits every imaginable roadblock in her attempt to steal the baldness formula, but every time the scene achieves a kind of tension, Gilroy cuts back to McCarthy's (self-) destruction. It displays exactly the understanding of restraint and absurdity that marks "The 39 Steps," and if Gilroy needs an entire sequence to match what Hitchcock does in a single frame, it's still a ringer: a dangerous business, indeed, but if you can pull it off, a lucrative one.
"The 39 Steps" is available today in a new Blu-ray edition from the Criterion Collection. "Duplicity" is available on DVD from Netflix, and on iTunes and Amazon Instant Video.