Tom Augustine reviews the weekend in film

What's the expiry date on a film? There's a time when the formula of a once-fresh title has become so copied in following years that the original starts to feel a little stale, particularly in the case of comedies. Zombieland: Double Tap (dir. Ruben Fleischer, R13) is a largely unnecessary sequel arriving a full decade after the heyday of the original zom-com. The first was a charmingly nasty little meta-adventure about a group of misfits who form a sort of dysfunctional family post-zombie apocalypse. It benefited from the chemistry of its cast -