Abstract: This paper provides an in-depth examination of Alan Ayckbourn's play Henceforward… (1987) through the techno-dystopian and posthumanist lenses. The scrutiny highlights Ayckbourn's prediction of a future where technology not only assists but deeply structures human relationships. The play centers around Jerome, a musician, who depends on NAN 300F, a machine-human-like designed to treat children as pets. He uses NAN 300F to convince his ex-wife, Corinna that he is a good father for their thirteen-year-old daughter, Geain so that Corinna gives him the custody of their daughter. He uses the machine to make it acts like his fiancée and calls it Zoe. Throughout the play, Jerome treats Nan 300F as a real human being. The machine could ensure Geain to play and stay with it; however, the mother couldn't. In the end, Corinna finds that NAN 300 F is a machine and leaves with her daughter while Jerome stays with it. Through a detailed thematic and textual analysis, this paper explores Ayckbourn's portrayal of this techno-dystopian future and illuminates how Henceforward… contributes to a deeper understanding of the play's commentary on technology and human relationships.