The latest strain on their yet-to-be-hallowed union arises when Stark's reckless battle with a mysterious, bin Laden-like terrorist known as the Mandarin (Ben Kingsley) endangers Pepper's life and sends Stark himself into temporary exile.

The anxiety attacks Stark begins to experience while on the lam — partly inspired by events recounted in "Marvels' The Avengers" (2012) — leave him questioning his gadgetry-dependent persona as Iron Man. This introduces one of the few substantive themes that director Shane Black's film — which he co-wrote with Drew Pearce — tarries to explore. Namely, the range of moral and immoral uses to which advanced technology can be turned.

Similar ethical ambiguities can be seen at work in the lives of two promising scientists gone bad: Stark's long-ago girlfriend of one night's standing, biochemist Maya Hansen (Rebecca Hall), and lab-nerd-turned-ladies'-man Aldrich Killian (Guy Pearce). These two, it turns out, are somehow in cahoots with the Mandarin, though just what they're up to is not initially made clear.

Like the touching friendship Stark strikes up with a bullied schoolboy (Ty Simpkins) while on the run, the brief examination of serious issues his newly developed sense of panic initiates gets muscled out of view by serial gunplay and explosions.

So where does it all lead? Why, to the highly flammable deck of an oil tanker, of course.

The film contains much action violence with some gore, cohabitation, an off-screen nonmarital sexual encounter, at least one use of profanity and occasional crude and crass language. The Catholic News Service classification is A-III – adults. The Motion Picture Association of America rating is PG-13 –– parents strongly cautioned. Some material may be inappropriate for children under 13.

Mulderig is on the staff of Catholic News Service.