What are the barriers we will need to overcome to make quantum computing relevant for the real-world problem? Are they problems inherent in scaling physical systems to large numbers of well-controlled qubits? The need for quantum communications networks to allow modular and distributed systems? The limitations of existing programming languages or the difficulty of constructing new quantum algorithms? Probably, all of these. To explore these barriers and how they are being addressed, Horizon Quantum Computing launched a series of discussions with experts in each of these domains. Each Quantum Well discussion, we talk with two scientists putting their energy into tunnelling through these barriers to useful quantum computing. Hosted by Joe Fitzsimons and Si-Hui Tan from Horizon Quantum Computing.