Diamorphine intoxication

Diamorphine intoxication is the physical crisis Henry creates when he drugs David Hunter and then threatens him with a further dose. Its effects make David too weak and disoriented to escape, while his growing recognition of the drug exposes the danger he is in. The episode’s significance extends beyond David’s immediate survival: after Henry dies from an overdose, the same drug becomes part of an unresolved question about whether his death was intentional.

The drug and its danger

David’s understanding catches up with his condition only gradually. Henry displays a full syringe and warns that it contains enough diamorphine to kill a horse. As David tries to interpret what he is seeing, his thoughts move sluggishly; he identifies diamorphine as a powerful painkiller derived from heroin, capable of causing hallucinations and coma. The danger is therefore not merely Henry’s threat to use the syringe: David realizes that Henry has already given him the drug.

The comparison David recalls to Harold Shipman, whose use of diamorphine killed patients, makes the substance’s threat legible to him through an earlier pattern of drug-induced death. This association does not settle exactly how much David has received or what his precise medical condition is. It does, however, make clear why he treats the syringe as potentially lethal and why Henry’s warning about another dose is credible within the scene.

Incapacitation and attempted resistance

The intoxication is conveyed through its effects on David’s capacity to act. He is in a wheelchair when he gathers his strength and lunges at Henry, but his legs immediately fail; he falls to the floor, and the movement sends the room spinning. Later, when he tries to push himself up again, his arms have no strength. His head pounds, his vision begins to haze, and he cannot pull his wrist away when Henry takes hold of it.

These details make the drug’s effect a practical constraint rather than a detached medical explanation. David can still recognize the threat and decide to resist, but he cannot reliably turn that decision into movement. His attempt to prepare himself to withstand another dose is thus made under conditions in which both perception and physical control are already compromised. The scene’s tension comes from the widening gap between what he understands and what his body allows him to do.

The withheld injection

Henry brings the needle to David’s forearm, but does not depress the syringe. He withdraws it and says he cannot go through with it. The moment establishes a distinction between the intoxication David has already suffered and the additional dose Henry is considering: Henry has drugged him, yet stops short of administering what he presents as a further lethal amount.

That pause does not undo the immediate danger or make Henry’s actions harmless. David remains on the floor, unable to free himself, while the haze continues to affect his vision. Nor does the scene explain conclusively why Henry stops. It records a hesitation at the point when David is most vulnerable, leaving the act’s significance to be reconsidered in light of the later evidence about Henry’s death and the unresolved nature of his intentions.

Henry’s overdose and the uncertainty of intent

The post-mortem establishes that Henry died from a massive diamorphine overdose, rather than from the injuries he suffered when the Land Rover struck him, though those injuries might themselves have proved fatal. An empty syringe was found in his pocket, with its needle embedded in his flesh. The account leaves open whether the overdose was accidental, perhaps caused by the crash, or whether Henry injected himself while in agony afterward.

The evidence does not resolve that uncertainty. David also questions why Henry had not simply given him a lethal dose if the aim was to stage David’s suicide; doing so would have been easier and more certain. At the inquest, investigators find that a rubber pipe was still passing through the Land Rover’s window, but its other end lay on the floor instead of being connected to the exhaust. This detail further unsettles any simple conclusion about Henry’s commitment to the apparent plan. Diamorphine is consequently both the means by which Henry nearly controls David’s fate and a clue that complicates the interpretation of Henry’s own final actions.