Night Was Our Friend

Sally decided to return to Martin because he was her husband and she felt a sense of duty and lingering emotional connection despite their previously difficult marriage. Though she had fallen in love with Dr. Harper during Martin's two-year absence, the shock of Martin's return and her wedding plans being disrupted made her reconsider her priorities. She chose to give their marriage another chance rather than abandon the man she had once loved.

Martin's erratic behavior stemmed from the traumatic experience of being held captive by an Amazonian tribe in Brazil for two years. He witnessed his companions die brutally in the jungle, which left him psychologically scarred. The trauma manifested as mood swings, paranoia, and violent outbursts that worsened over the six months following his return, making him a danger to himself and others.

Earlier in the film, Martin is described as deeply altered after his ordeal, foreshadowing his mental decline.

Sally was charged with murder because Martin's mother Emily witnessed Martin attacking Sally on the night of his death and believed Sally had killed him in self-defense or that she was somehow responsible. The circumstances of Martin's suicide, combined with Sally's earlier contemplation of killing him with sleeping tablets and the attack his mother witnessed, created enough suspicion for authorities to bring charges. The fact that she had considered ending his life gave prosecutors grounds to pursue the case.

Sally considered killing Martin to protect him from being jailed or institutionalized after his violent attack on a man during a nighttime walk. She was desperate to save him from the consequences of his actions, which reminded him of losing his freedom in Brazil. However, she could not go through with it, and Martin ultimately took his own life instead, leaving her to face murder charges she did not commit.

Martin committed suicide to avoid facing the consequences of his violent attack, which had been discovered by Glan. Having already experienced the loss of freedom during his captivity in Brazil, Martin would rather die than be institutionalized or imprisoned. His fear of losing his freedom again, combined with his deteriorating mental state, led him to take his own life instead of accepting treatment.

Martin's earlier plea to Sally to find another way besides treatment shows his deep fear of losing his freedom.

Martin's mother Emily witnessed Martin attack Sally on the night of his death. This violent incident, seen from her perspective, led her to believe that Sally had killed her son in self-defense or that she was somehow responsible for his death. Emily's testimony contributed to Sally being charged with murder, despite the later jury verdict of not guilty.

Sally remained hesitant to marry Dr. Harper even after her acquittal because she was haunted by the guilt and trauma of the entire ordeal. Despite being cleared of murder, she questioned whether she could have done more to save Martin. The weight of her failed marriage, her contemplation of killing him, and his ultimate suicide left her feeling undeserving of happiness with the doctor, leaving her future uncertain.

Martin was held captive by an Amazonian tribe in Brazil for two years after his plane crash. During his captivity, he witnessed his companions die violently in the jungle, which left him psychologically traumatized. When he eventually escaped, he returned home a deeply changed man, unable to readjust to normal life.

Martin's violent attack on a man during a nighttime walk was triggered by his deteriorating mental state caused by trauma. The attack occurred during one of his wild nocturnal walks, which were a symptom of his psychological instability. His paranoia and inability to control his impulses led him to assault a stranger, an act that terrified witnesses and confirmed the danger he posed.

The film establishes Martin's erratic behavior and nighttime walks as symptoms of his declining mental health weeks before the attack.

Sally did not commit Martin to a mental hospital sooner because he begged her not to, recalling the loss of freedom he suffered in Brazil. When Glan urged her to secure treatment, Sally asked Martin to consent, but he refused, fearing confinement more than anything else. His desperate plea for another way left Sally unable to force the decision, until tragedy struck.

Glan (Arthur Glanville) was a close family friend who helped recognize the danger Martin posed and urged Sally to take action. He discovered evidence of Martin's violent attack and pressed Sally to get Martin treatment to prevent him from being jailed. Glan believed in Sally's innocence throughout the trial and supported her, though his efforts to help came too late to prevent the tragedy.

Martin was missing for two years before he was found alive and returned home. During this time, he was held captive by an Amazonian tribe in Brazil, while everyone in England presumed him dead. It was during this two-year absence that Sally fell in love with Dr. Harper and planned to marry him, creating the complicated emotional situation Martin found upon his return.