The Slender Thread is, on paper, a film that should not work. For most of its running time, it is a telephone conversation between two strangers: a man who answers phones at a suicide-crisis centre, and a woman who has taken an overdose and is calling, perhaps, to say goodbye. There are no car chases, no grand sets, and very little action beyond a race to trace a call. That the film holds the attention at all is a tribute to its two leads — Sidney Poitier as Alan Newell, the volunteer, and Anne Bancroft as Inga Dyson, the woman on the other end of the line — and to director Sydney Pollack, making his feature debut, who understood that a voice can be as dramatic as a face.
Bancroft plays Inga as a woman who is, at first, almost maddeningly calm. She has taken a large number of sleeping pills. She is alone in a Seattle hotel room, or so she says, and she has called the crisis centre not quite knowing why. She tells Alan fragments of her life: a marriage that has failed, a husband, Mark, played by Telly Savalas, who is a fisherman and a man she still loves in a complicated way, a sense of having become a burden to the people around her. Bancroft’s voice does most of the work here, and it is extraordinary work. It is soft, slightly slurred as the pills take effect, wry, and intermittently angry. She jokes with Alan, she resists his questions, she tries to hang up, and she keeps talking — because, underneath the calm, she wants to be talked out of dying, even if she cannot quite admit it.
A performance made of voice
Pollack intercuts Inga’s hotel room with Alan’s centre, with flashbacks to Inga’s marriage, and with the frantic efforts of the police and the centre’s staff to trace the call. Bancroft appears in the flashbacks as a younger, livelier Inga, a woman who loved, argued, and laughed with her husband before the marriage soured. Those scenes are important because they prevent Inga from becoming a mere case study. We see what she has lost: not just a husband, but a version of herself who was confident and desired. Bancroft plays the younger Inga with a lightness that makes the present-day Inga’s weariness all the more painful. The contrast is not achieved with makeup or costume alone. It is achieved with posture, with energy, with the difference between a voice that sparkles and a voice that is fading.
In the present-day scenes, Bancroft is often filmed in close-up, lying on a bed, her face half in shadow, a telephone receiver pressed to her ear. She does very little, physically, and yet the performance never feels static. Her eyes drift, close, open again. Her hand tightens on the receiver. She smiles, suddenly, at something Alan says, and the smile fades as quickly as it came. It is a reminder of how much Bancroft learned on stage about stillness: she does not need to move to hold a scene, because she is thinking, feeling, and deciding in front of us, moment by moment. Poitier matches her, playing Alan as a man who is himself under strain — a psychology student whose own marriage is in trouble, who is learning, as he talks to Inga, how little he knows about saving anyone, including himself.
The film’s title refers to the fragile connection between the two strangers: a telephone line, a voice, a thread that could snap at any moment. Bancroft makes that metaphor feel literal. Every time Inga’s voice grows fainter, or she stops answering, the audience feels the thread thinning. Every time she answers again, with a joke or a memory, it feels like a small victory. Pollack, who would go on to direct Bancroft again in other contexts and to become one of Hollywood’s most reliable directors of adult drama, already shows here a gift for letting actors carry a scene without unnecessary camera trickery. He trusts Bancroft and Poitier to do the work, and they repay that trust.
A film about listening
The Slender Thread is also, quietly, a film about a particular kind of care. Alan cannot see Inga. He cannot touch her, or give her medicine, or hold her hand. All he can do is listen, ask questions, and keep her talking until help arrives. Bancroft’s performance honours that idea. She does not play Inga as a woman who wants a hero. She plays her as a woman who wants to be heard — truly heard, for the first time in a long time — by someone who is not judging her, fixing her, or using her. When she tells Alan about her husband, about her sense of failure, about the pills, she is not delivering exposition. She is testing whether another human being will stay on the line.
The film’s ending, in which Inga is found and saved, is not presented as a tidy happy ending. Bancroft plays Inga’s rescue not as triumph but as exhaustion and bewilderment, as if she is not quite sure whether she is glad to be alive. That honesty is characteristic of her work. She never sentimentalises despair, and she never pretends that being saved solves the problems that led to despair in the first place. Inga will still have to face her marriage, her loneliness, and herself. What has changed is that someone listened, and for one night, that was enough.
The Slender Thread is not Bancroft’s most famous film, and it is not often revived. But it deserves a place in any account of her career, because it shows a side of her that the bigger, showier roles sometimes obscure: her ability to be intimate, quiet, and devastatingly precise with almost nothing but a voice and a face in shadow. In a career full of formidable women — teachers, mothers, rivals, nuns — Inga Dyson is one of the most vulnerable, and Bancroft plays that vulnerability without ever making it pitiable. She makes it human, which is a harder and braver thing.