Writer Fred McNamara praises the episode, calling it one of the series' "most taut, nerve-chilling" instalments. He describes the first half as a "deft blend of atmosphere and model work", highlighting the depiction of night-time London (which he describes as a "model-maker's paradise"), the hijacking of the transporter truck ("downright thrilling") and Macey's exploration of the underground car park (a "sublime cocktail of lighting and direction"). Among his few criticisms are the expository closing scene, which he views as a "limp, dry aftermath to an otherwise brilliant episode – one that mixes dark atmospherics and full-blown action into an engrossing whole."