3/3 - If AI systems are going to be used in the real world, they have to work. This final film in the UK AI Reality series focuses on where generative AI projects actually succeed or fail, and why trust, quality, and control matter more than capability or scale. Jack Perschke speaks from direct experience about delivery, governance, auditability, and the practical constraints that shape whether AI systems can be relied on in public services and critical infrastructure. Rather than debating futures or hypotheticals, the conversation stays grounded in how systems behave once they are deployed, and what it takes to make them dependable over time. This is where the series closes, not with opinion, but with operational reality.